{"id":1930,"date":"2025-04-09T11:08:19","date_gmt":"2025-04-09T10:08:19","guid":{"rendered":"https:\/\/ltpsdz.com\/?p=1930"},"modified":"2025-06-05T17:04:02","modified_gmt":"2025-06-05T16:04:02","slug":"geophysical-laboratory","status":"publish","type":"post","link":"https:\/\/ltps.dz\/en\/geophysical-laboratory\/","title":{"rendered":"Geophysical laboratory"},"content":{"rendered":"<div class=\"vce-row-container\"><div class=\"vce-row vce-element--xl--has-background vce-element--lg--has-background vce-element--md--has-background vce-element--sm--has-background vce-element--xs--has-background vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" data-vce-full-width=\"true\" id=\"el-cd90c4de\" data-vce-do-apply=\"all el-cd90c4de\"><div class=\"vce-content-background-container\"><div class=\"vce-asset-background-simple-container vce-visible-xl-only vce-asset-background-simple--style-cover vce-asset-background-simple--position-center-center\"><div class=\"vce-asset-background-simple\">\n              <div class=\"vce-asset-background-simple-item vcv-lozad\" data-background-image=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/01\/photo-1556894769-b9a5dab851c0.jpg\"><\/div>\n              <noscript>\n                <div class=\"vce-asset-background-simple-item\" style=\"background-image: url(https:\/\/ltps.dz\/wp-content\/uploads\/2025\/01\/photo-1556894769-b9a5dab851c0.jpg)\"><\/div>\n              <\/noscript>\n            <\/div><\/div><div class=\"vce-asset-color-gradient-container vce-visible-xl-only\" data-vce-do-apply=\"gradient el-cd90c4de\"><\/div><div class=\"vce-asset-background-simple-container vce-visible-lg-only vce-asset-background-simple--style-cover vce-asset-background-simple--position-center-center\"><div class=\"vce-asset-background-simple\">\n              <div class=\"vce-asset-background-simple-item vcv-lozad\" data-background-image=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/01\/photo-1556894769-b9a5dab851c0.jpg\"><\/div>\n              <noscript>\n                <div class=\"vce-asset-background-simple-item\" style=\"background-image: url(https:\/\/ltps.dz\/wp-content\/uploads\/2025\/01\/photo-1556894769-b9a5dab851c0.jpg)\"><\/div>\n              <\/noscript>\n            <\/div><\/div><div class=\"vce-asset-color-gradient-container vce-visible-lg-only\" data-vce-do-apply=\"gradient el-cd90c4de\"><\/div><div class=\"vce-asset-background-simple-container vce-visible-md-only vce-asset-background-simple--style-cover vce-asset-background-simple--position-center-center\"><div class=\"vce-asset-background-simple\">\n              <div class=\"vce-asset-background-simple-item vcv-lozad\" data-background-image=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/01\/photo-1556894769-b9a5dab851c0.jpg\"><\/div>\n              <noscript>\n                <div class=\"vce-asset-background-simple-item\" style=\"background-image: url(https:\/\/ltps.dz\/wp-content\/uploads\/2025\/01\/photo-1556894769-b9a5dab851c0.jpg)\"><\/div>\n              <\/noscript>\n            <\/div><\/div><div class=\"vce-asset-color-gradient-container vce-visible-md-only\" data-vce-do-apply=\"gradient el-cd90c4de\"><\/div><div class=\"vce-asset-background-simple-container vce-visible-sm-only vce-asset-background-simple--style-cover vce-asset-background-simple--position-center-center\"><div class=\"vce-asset-background-simple\">\n              <div class=\"vce-asset-background-simple-item vcv-lozad\" data-background-image=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/01\/photo-1556894769-b9a5dab851c0.jpg\"><\/div>\n              <noscript>\n                <div class=\"vce-asset-background-simple-item\" style=\"background-image: url(https:\/\/ltps.dz\/wp-content\/uploads\/2025\/01\/photo-1556894769-b9a5dab851c0.jpg)\"><\/div>\n              <\/noscript>\n            <\/div><\/div><div class=\"vce-asset-color-gradient-container vce-visible-sm-only\" data-vce-do-apply=\"gradient el-cd90c4de\"><\/div><div class=\"vce-asset-background-simple-container vce-visible-xs-only vce-asset-background-simple--style-cover vce-asset-background-simple--position-center-center\"><div class=\"vce-asset-background-simple\">\n              <div class=\"vce-asset-background-simple-item vcv-lozad\" data-background-image=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/01\/photo-1556894769-b9a5dab851c0.jpg\"><\/div>\n              <noscript>\n                <div class=\"vce-asset-background-simple-item\" style=\"background-image: url(https:\/\/ltps.dz\/wp-content\/uploads\/2025\/01\/photo-1556894769-b9a5dab851c0.jpg)\"><\/div>\n              <\/noscript>\n            <\/div><\/div><div class=\"vce-asset-color-gradient-container vce-visible-xs-only\" data-vce-do-apply=\"gradient el-cd90c4de\"><\/div><\/div><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-053fd7e2\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-053fd7e2\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-053fd7e2\"><div class=\"vce-layouts-post-title-container page-title vce-layouts-post-title-container--align-left\"><div class=\"vce-layouts-post-title vce\" id=\"el-35219685\" data-vce-do-apply=\"all el-35219685\"><h1>Geophysical laboratory<\/h1><\/div><\/div><div class=\"vce vce-separator-container vce-separator--align-left vce-separator--style-solid\" id=\"el-fb313522\" data-vce-do-apply=\"margin el-fb313522\"><div class=\"vce-separator vce-separator--color-b-255-0-0 vce-separator--width-30 vce-separator--thickness-5\" data-vce-do-apply=\"border padding background  el-fb313522\"><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-row-container\"><div class=\"vce-row vce-element--has-background vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" data-vce-full-width=\"true\" id=\"el-c3b11516\" data-vce-do-apply=\"all el-c3b11516\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-773aac20\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-773aac20\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-773aac20\"><div class=\"vce-row-container\" data-vce-boxed-width=\"true\"><div class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" id=\"el-875d0002\" data-vce-do-apply=\"all el-875d0002\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-e93af0dd\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-e93af0dd\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-e93af0dd\"><div class=\"vce-image-gallery vce-image-gallery--gap-10 vce-image-gallery--columns-4\" data-photoswipe-gallery=\"90dbe37d\"><div class=\"vce-image-gallery-wrapper vce\" id=\"el-90dbe37d\" data-vce-do-apply=\"all el-90dbe37d\"><div class=\"vce-image-gallery-list\"><div class=\"vce-image-gallery-item\" data-photoswipe-item=\"photoswipe-90dbe37d\"><figure class=\"vce-image-gallery-item-inner-wrapper\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/Laboratoire-geophysique.jpg\" data-photoswipe-image=\"90dbe37d\" data-photoswipe-index=\"0\" class=\"vce-image-gallery-item-inner\" data-pswp-uid=\"1\"><img decoding=\"async\" class=\"vce-image-gallery-img\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/Laboratoire-geophysique.jpg\" alt=\"\" title=\"Laboratoire g\u00e9ophysique\"><\/a><\/figure><\/div><div class=\"vce-image-gallery-item\" data-photoswipe-item=\"photoswipe-90dbe37d\"><figure class=\"vce-image-gallery-item-inner-wrapper\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/essais-speciaux-2.jpg\" data-photoswipe-image=\"90dbe37d\" data-photoswipe-index=\"1\" class=\"vce-image-gallery-item-inner\" data-pswp-uid=\"2\"><img decoding=\"async\" class=\"vce-image-gallery-img\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/essais-speciaux-2.jpg\" alt=\"\" title=\"essais speciaux (2)\"><\/a><\/figure><\/div><div class=\"vce-image-gallery-item\" data-photoswipe-item=\"photoswipe-90dbe37d\"><figure class=\"vce-image-gallery-item-inner-wrapper\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/essais-speciaux-3.jpg\" data-photoswipe-image=\"90dbe37d\" data-photoswipe-index=\"2\" class=\"vce-image-gallery-item-inner\" data-pswp-uid=\"3\"><img decoding=\"async\" class=\"vce-image-gallery-img\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/essais-speciaux-3.jpg\" alt=\"\" title=\"essais speciaux (3)\"><\/a><\/figure><\/div><\/div><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-f90aee27\" data-vce-do-apply=\"all el-f90aee27\"><p><span style=\"color: #454444; font-family: inherit; font-size: inherit;\">Surface geophysics in geotechnics encompasses a set of non-destructive methods used to explore the subsurface first few tens of meters. It plays a crucial role in site investigation prior to construction works by providing information on the nature, structure, and mechanical state of soils. These techniques complement traditional drilling techniques by offering a comprehensive and continuous view of the subsurface; thereby facilitating decision-making in civil engineering.<\/span><\/p>\n<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-row-container\"><div class=\"vce-row vce-element--xl--has-background vce-element--lg--has-background vce-element--md--has-background vce-element--sm--has-background vce-element--xs--has-background vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" data-vce-full-width=\"true\" id=\"el-db9e8106\" data-vce-do-apply=\"all el-db9e8106\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-98b1a81e\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-98b1a81e\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-98b1a81e\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-left vce-google-fonts-heading--color-b-0-0-0--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Lora\"><div id=\"el-9a515a96\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-9a515a96\"><h2 class=\"vce-google-fonts-heading-inner\" style=\"font-size: 25px; line-height: 1.5; font-weight: 400; font-style: normal;\">THERMAL CONDUCTIVITY<\/h2><\/div><\/div><\/div><div class=\"vce vce-separator-container vce-separator--align-left vce-separator--style-solid\" id=\"el-a47d7fab\" data-vce-do-apply=\"margin el-a47d7fab\"><div class=\"vce-separator vce-separator--color-b-255-0-0 vce-separator--width-20 vce-separator--thickness-5\" data-vce-do-apply=\"border padding background  el-a47d7fab\"><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-5d72c69f\" data-vce-do-apply=\"all el-5d72c69f\"><p>Thermal conductivity (\u03bb) is a material-specific characteristic. It indicates the amount of heat flux through thermal conduction.<\/p>\n<p>The LTPS\u2019s department of geophysical tests has the following equipment:<\/p>\n<ul>\n<li>CRU01 monitoring and reading unit branded Hukseflux<\/li>\n<li>Thermal Sensors;<\/li>\n<li>TP09 heating probe;<\/li>\n<li>An LN01 lance (1.5 m);<\/li>\n<li>High-performance processing and interpretation software (Hukseflux CRU01); The thermal conductivity method is applied in:<\/li>\n<li>Measuring soil thermal conductivity and resistivity;<\/li>\n<\/ul><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-5311375c\" data-vce-do-apply=\"all el-5311375c\"><p style=\"text-align: left;\" align=\"center\"><span style=\"color: #ff0000; font-family: inherit; font-size: inherit;\"><b>Scope<img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1946 alignright\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-2-300x282.png\" alt=\"\" width=\"300\" height=\"282\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-2-300x282.png 300w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-2-320x301.png 320w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-2.png 350w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/b><\/span><b><\/b><\/p>\n<p align=\"justify\"><span style=\"font-family: inherit; font-size: inherit;\">M<span lang=\"en-US\">easuring soil thermal conductivity is performed using a thermal shock probe. It consists of two parts:<\/span><\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: inherit;\">\u2022 <span lang=\"en-US\">A cylindrical resistive element in which a constant amount of heat is dissipated by the Joule effect throughout the measurement;<\/span><\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: inherit;\">\u2022 <span lang=\"en-US\">A temperature calculation probe placed at the soil-probe interface.<\/span><\/span><\/p><\/div><\/div><div class=\"vce-row-container\" data-vce-boxed-width=\"true\"><div class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" id=\"el-8c47ca7b\" data-vce-do-apply=\"all el-8c47ca7b\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-71a67943\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-71a67943\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-71a67943\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-b-255-0-0--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-ded5d68d\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-ded5d68d\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 20px; font-weight: 400; font-style: normal;\">Insitu tests<\/p><\/div><\/div><\/div><div class=\"vce-row-container\" data-vce-boxed-width=\"true\"><div class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" id=\"el-e4d003bb\" data-vce-do-apply=\"all el-e4d003bb\"><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-38ec575c\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-38ec575c\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-38ec575c\"><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-6df984f2\" data-vce-do-apply=\"all el-6df984f2\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 216px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 132.87%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"216\" height=\"287\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-3-216x287.png 216w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-3-216x287.png\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-3.png\" data-attachment-id=\"1953\"  alt=\"\" title=\"image (3)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last\" id=\"el-7bd1d792\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-7bd1d792\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-7bd1d792\"><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-65eb79b2\" data-vce-do-apply=\"all el-65eb79b2\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 216px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 132.87%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"216\" height=\"287\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-4-216x287.png 216w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-4-216x287.png\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-4.png\" data-attachment-id=\"1956\"  alt=\"\" title=\"image (4)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last\" id=\"el-198cb67d\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-198cb67d\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-198cb67d\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-b-255-0-0--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-6fe2771b\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-6fe2771b\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 20px; font-weight: 400; font-style: normal;\">Laboratory tests<\/p><\/div><\/div><\/div><div class=\"vce-row-container\" data-vce-boxed-width=\"true\"><div class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" id=\"el-499abf88\" data-vce-do-apply=\"all el-499abf88\"><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-36e6a915\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-36e6a915\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-36e6a915\"><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-465b88dd\" data-vce-do-apply=\"all el-465b88dd\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 216px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 132.87%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"216\" height=\"287\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-216x287.jpg 216w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-216x287.jpg\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image.jpg\" data-attachment-id=\"1959\"  alt=\"\" title=\"image\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last\" id=\"el-2d233edc\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-2d233edc\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-2d233edc\"><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-3d835dff\" data-vce-do-apply=\"all el-3d835dff\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 216px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 132.87%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"216\" height=\"287\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-1-216x287.jpg 216w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-1-216x287.jpg\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-1.jpg\" data-attachment-id=\"1962\"  alt=\"\" title=\"image (1)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-row-container\"><div class=\"vce-row vce-element--has-background vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" data-vce-full-width=\"true\" id=\"el-1c8868a6\" data-vce-do-apply=\"all el-1c8868a6\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-5ea0f043\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-5ea0f043\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-5ea0f043\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-left vce-google-fonts-heading--color-b-0-0-0--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Lora\"><div id=\"el-6c4e4658\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-6c4e4658\"><h2 class=\"vce-google-fonts-heading-inner\" style=\"font-size: 25px; line-height: 1.5; font-weight: 400; font-style: normal;\">Electrical Prospecting<\/h2><\/div><\/div><\/div><div class=\"vce vce-separator-container vce-separator--align-left vce-separator--style-solid\" id=\"el-cd56c677\" data-vce-do-apply=\"margin el-cd56c677\"><div class=\"vce-separator vce-separator--color-b-255-0-0 vce-separator--width-20 vce-separator--thickness-5\" data-vce-do-apply=\"border padding background  el-cd56c677\"><\/div><\/div><div class=\"vce-image-gallery vce-image-gallery--gap-10 vce-image-gallery--columns-5\"><div class=\"vce-image-gallery-wrapper vce\" id=\"el-17734411\" data-vce-do-apply=\"all el-17734411\"><div class=\"vce-image-gallery-list\"><div class=\"vce-image-gallery-item\"><figure class=\"vce-image-gallery-item-inner-wrapper\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-1-1.png\" data-lightbox=\"lightbox-17734411\" class=\"vce-image-gallery-item-inner\"><img decoding=\"async\" class=\"vce-image-gallery-img\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-1-1.png\" alt=\"\" title=\"image (1)\"><\/a><\/figure><\/div><div class=\"vce-image-gallery-item\"><figure class=\"vce-image-gallery-item-inner-wrapper\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-2.jpg\" data-lightbox=\"lightbox-17734411\" class=\"vce-image-gallery-item-inner\"><img decoding=\"async\" class=\"vce-image-gallery-img\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-2.jpg\" alt=\"\" title=\"image\"><\/a><\/figure><\/div><div class=\"vce-image-gallery-item\"><figure class=\"vce-image-gallery-item-inner-wrapper\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-5.png\" data-lightbox=\"lightbox-17734411\" class=\"vce-image-gallery-item-inner\"><img decoding=\"async\" class=\"vce-image-gallery-img vce-image-gallery-img--orientation-portrait\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-5.png\" alt=\"\" title=\"image\"><\/a><\/figure><\/div><\/div><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-e1b18565\" data-vce-do-apply=\"all el-e1b18565\"><p><span style=\"font-size: inherit; font-family: inherit;\"><span lang=\"en-US\">Electrical prospecting methods are used to determine soil properties by measuring their resistivity <\/span>\u03c1<span lang=\"en-US\"> (Ohm.m).<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\"><span lang=\"en-US\">The LTPS\u2019s department of Special Tests has the following electrical equipment:<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 <span lang=\"en-US\">Terrameter LS, branded ABEM (2500 mA, 250 W, 600 V);<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 <span lang=\"en-US\">4 coils for electrical tomography (64 electrodes, spaced up to 10 meters);<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 <span lang=\"en-US\">4 coils for vertical electrical sounding;<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 <span lang=\"en-US\">High-performance processing software (RES2DINV, RES3DINV)<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\"><span lang=\"en-US\">The investigation depth depends on the device used and the nature of the terrain.<\/span><\/span><\/p>\n<p><b>It is applied in :<\/b><\/p>\n<ul>\n<li>\n<p><span style=\"font-size: inherit; font-family: inherit;\"> <span lang=\"en-US\">Geotechnical investigations and soil studies;<\/span><\/span><\/p>\n<\/li>\n<li>\n<p><span style=\"font-size: inherit; font-family: inherit;\">Grounding;<\/span><\/p>\n<\/li>\n<li>\n<p><span style=\"font-size: inherit; font-family: inherit;\">Water resource studies;<\/span><\/p>\n<\/li>\n<li>\n<p><span style=\"font-size: inherit; font-family: inherit;\">Cathodic protection;<\/span><\/p>\n<\/li>\n<\/ul>\n<p><b><\/b><span style=\"color: #ff0000;\"><b style=\"font-family: inherit;\">SCOPE<\/b><\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">The measurement principle is broken down into three steps:<\/span><\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">1\/ Injection of a current i: from the electrical source through the injection electrodes (A, B);<\/span><\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">2\/ Measurement of the potential difference DV: between the measuring electrodes (M, N);<\/span><\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">3\/ Calculation of the apparent resistivity ra: derived from Ohm's law.<\/span><\/span><\/p><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-left\"><div class=\"vce vce-single-image-wrapper\" id=\"el-16ee840c\" data-vce-do-apply=\"all el-16ee840c\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 267px;\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/principe-de-la-methode.png\" data-lightbox=\"lightbox-16ee840c\" class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 62.5468%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"267\" height=\"167\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/principe-de-la-methode-267x167.png 267w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/principe-de-la-methode-267x167.png\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/principe-de-la-methode.png\" data-attachment-id=\"1967\"  alt=\"\" title=\"principe de la methode\" \/><\/a><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-d5219eb2\" data-vce-do-apply=\"all el-d5219eb2\"><p><span style=\"color: #ff0000; font-family: inherit; font-size: 14pt;\"><b>DIFFERENT TECHNIQUES<\/b><\/span><\/p><\/div><\/div><div class=\"vce-row-container\" data-vce-boxed-width=\"true\"><div class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" id=\"el-8e8228a5\" data-vce-do-apply=\"all el-8e8228a5\"><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-9ef53e26\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-9ef53e26\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-9ef53e26\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-d6b073f5\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-d6b073f5\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 17px; font-weight: 600; font-style: normal;\">Vertical Electrical Sounding<\/p><\/div><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-cec24efe\" data-vce-do-apply=\"all el-cec24efe\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 262px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 79.0076%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"262\" height=\"207\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-3-1-262x207.png 262w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-3-1-262x207.png\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-3-1.png\" data-attachment-id=\"1979\"  alt=\"\" title=\"image (3)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-50036871\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-50036871\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 12px; font-weight: 300; font-style: normal;\">Depth variation of resistivity<\/p><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first\" id=\"el-d74dd40c\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-d74dd40c\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-d74dd40c\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-cb977ea3\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-cb977ea3\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 17px; font-weight: 600; font-style: normal;\">Electrical Dragging<\/p><\/div><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-a0e8ca3c\" data-vce-do-apply=\"all el-a0e8ca3c\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 312px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 68.2692%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"312\" height=\"213\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-1-1-312x213.jpg 312w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-1-1-312x213.jpg\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-1-1.jpg\" data-attachment-id=\"1982\"  alt=\"\" title=\"image (1)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-f4ad517e\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-f4ad517e\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 12px; font-weight: 300; font-style: normal;\">Lateral variation of resistivity (Iso-resistivity map)<\/p><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last\" id=\"el-b71f5420\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-b71f5420\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-b71f5420\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-1a12f106\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-1a12f106\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 17px; font-weight: 600; font-style: normal;\">Electrical Tomography<\/p><\/div><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-8f738951\" data-vce-do-apply=\"all el-8f738951\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 291px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 70.4467%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"291\" height=\"205\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-2-1-291x205.jpg 291w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-2-1-291x205.jpg\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-2-1.jpg\" data-attachment-id=\"1985\"  alt=\"\" title=\"image (2)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-573c400b\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-573c400b\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 12px; font-weight: 300; font-style: normal;\">Lateral and depth variation of resistivity<\/p><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-row-container\"><div class=\"vce-row vce-element--xl--has-background vce-element--lg--has-background vce-element--md--has-background vce-element--sm--has-background vce-element--xs--has-background vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" data-vce-full-width=\"true\" id=\"el-4afab7cd\" data-vce-do-apply=\"all el-4afab7cd\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-c89c84d4\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-c89c84d4\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-c89c84d4\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-left vce-google-fonts-heading--color-b-0-0-0--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Lora\"><div id=\"el-6f9ad147\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-6f9ad147\"><h2 class=\"vce-google-fonts-heading-inner\" style=\"font-size: 25px; line-height: 1.5; font-weight: 400; font-style: normal;\">TDEM Electromagnetic Prospecting<\/h2><\/div><\/div><\/div><div class=\"vce vce-separator-container vce-separator--align-left vce-separator--style-solid\" id=\"el-f4922650\" data-vce-do-apply=\"margin el-f4922650\"><div class=\"vce-separator vce-separator--color-b-255-0-0 vce-separator--width-20 vce-separator--thickness-5\" data-vce-do-apply=\"border padding background  el-f4922650\"><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-left\"><div class=\"vce vce-single-image-wrapper\" id=\"el-c2301bcd\" data-vce-do-apply=\"all el-c2301bcd\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 352px;\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-3.png\" data-lightbox=\"lightbox-c2301bcd\" class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 67.3295%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"352\" height=\"237\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-3-320x215.png 320w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-3-352x237.png 352w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-3-352x237.png\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-3.png\" data-attachment-id=\"1989\"  alt=\"\" title=\"image\" \/><\/a><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-fd022d12\" data-vce-do-apply=\"all el-fd022d12\"><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\">T<span lang=\"en-US\">he time-domain electromagnetic (TDEM) method allows for the reconstruction of the actual resistivity distribution of the subsurface at up to 300-400 m depth.<\/span><\/span><\/p><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">The LTPS department of Special Tests has the following electrical equipment:<\/span><\/span><\/p><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\">\u2022 <span lang=\"en-US\">Walk TEM 2 RX unit branded ABEM;<\/span><\/span><\/p><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\">\u2022 <span lang=\"en-US\">Walk TEM 2 20 A TX transmitter branded ABEM;<\/span><\/span><\/p><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\">\u2022 <span lang=\"en-US\">40x40 m transmitter loop;<\/span><\/span><\/p><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\">\u2022 <span lang=\"en-US\">RC-200 receiver loop.<\/span><\/span><\/p><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">The investigation depth depends on the equipment used and the nature of the ground.<\/span><\/span><\/p><p style=\"text-align: left;\" align=\"center\" data-mce-style=\"text-align: left;\"><span style=\"color: #ff0000; font-family: inherit; font-size: inherit;\" data-mce-style=\"color: #ff0000; font-family: inherit; font-size: inherit;\"><strong>PRINCIPLE OF THE METHOD<img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1992 alignright\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-2-300x300.jpg\" alt=\"\" width=\"300\" height=\"300\" data-mce-src=\"..\/..\/..\/..\/..\/wp-content\/uploads\/2025\/02\/image-2-300x300.jpg\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-2-300x300.jpg 300w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-2-150x150.jpg 150w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-2-320x320.jpg 320w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-2-480x480.jpg 480w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-2.jpg 500w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/strong><\/span><\/p><p style=\"text-align: left;\" align=\"center\" data-mce-style=\"text-align: left;\"><span style=\"color: #000000; font-family: inherit; font-size: inherit;\" data-mce-style=\"color: #000000; font-family: inherit; font-size: inherit;\">The TDEM method is based on the phenomenon of transient electromagnetic field diffusion. This field is created by the sudden interruption of a current flowing in a transmitting loop. This primary electromagnetic field creates eddy currents in buried conductive objects. These induce a transient secondary magnetic field measured by one or two receiving loops during the interruption. <\/span><\/p><p><span style=\"color: #000000; font-family: inherit; font-size: inherit;\" data-mce-style=\"color: #000000; font-family: inherit; font-size: inherit;\"><strong>It is applied in&nbsp;:<img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1995 alignright\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-1-1-300x211.png\" alt=\"\" width=\"300\" height=\"211\" data-mce-src=\"..\/..\/..\/..\/..\/wp-content\/uploads\/2025\/02\/image-1-1-300x211.png\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-1-1-300x211.png 300w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-1-1-320x225.png 320w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-1-1.png 346w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/strong><\/span><\/p><ul><li><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\"> <span lang=\"en-US\">Geotechnical investigations and soil studies.<\/span><\/span><\/p><\/li><li><p><span style=\"font-size: inherit; font-family: inherit;\" data-mce-style=\"font-size: inherit; font-family: inherit;\"><span lang=\"en-US\">Groundwater investigation.<\/span><\/span><\/p><\/li><li><p><span style=\"font-size: inherit; font-family: inherit;\" data-mce-style=\"font-size: inherit; font-family: inherit;\"><span lang=\"en-US\">Bedrock depth.<\/span><\/span><\/p><\/li><li><p><span style=\"font-size: inherit; font-family: inherit;\" data-mce-style=\"font-size: inherit; font-family: inherit;\"><span lang=\"en-US\">Grounding;<\/span><\/span><\/p><\/li><li><p><span style=\"font-size: inherit; font-family: inherit;\" data-mce-style=\"font-size: inherit; font-family: inherit;\">Cathodic protection;<\/span><\/p><\/li><\/ul><p><span style=\"color: #000000; font-size: inherit; font-family: inherit;\" data-mce-style=\"color: #000000; font-size: inherit; font-family: inherit;\"><strong>Advantages of the TDEM method:<img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-1998 alignright\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-2-1-300x191.png\" alt=\"\" width=\"300\" height=\"191\" data-mce-src=\"..\/..\/..\/..\/..\/wp-content\/uploads\/2025\/02\/image-2-1-300x191.png\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-2-1-300x191.png 300w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-2-1-320x203.png 320w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/02\/image-2-1.png 346w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/strong><\/span><\/p><ul><li><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\"><strong>Significant investigation depth.<\/strong><\/span><\/span><\/p><\/li><li><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\"><strong>No contact with the ground (avoiding high soil contact resistance problems).<\/strong><\/span><\/span><\/p><\/li><li><p><span style=\"font-family: inherit; font-size: inherit;\" data-mce-style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\"><strong>Good penetration into conductive environments.<\/strong><\/span><\/span><\/p><\/li><\/ul><\/div><\/div><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-left vce-google-fonts-heading--color-b-0-0-0--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Lora\"><div id=\"el-fd89503e\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-fd89503e\"><h2 class=\"vce-google-fonts-heading-inner\" style=\"font-size: 25px; line-height: 1.5; font-weight: 400; font-style: normal;\">Electromagnetic Prospecting<\/h2><\/div><\/div><\/div><div class=\"vce vce-separator-container vce-separator--align-left vce-separator--style-solid\" id=\"el-303b8aed\" data-vce-do-apply=\"margin el-303b8aed\"><div class=\"vce-separator vce-separator--color-b-255-0-0 vce-separator--width-20 vce-separator--thickness-5\" data-vce-do-apply=\"border padding background  el-303b8aed\"><\/div><\/div><div class=\"vce-image-gallery vce-image-gallery--gap-10 vce-image-gallery--columns-5\"><div class=\"vce-image-gallery-wrapper vce\" id=\"el-84e51889\" data-vce-do-apply=\"all el-84e51889\"><div class=\"vce-image-gallery-list\"><div class=\"vce-image-gallery-item\"><figure class=\"vce-image-gallery-item-inner-wrapper\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-6.png\" data-lightbox=\"lightbox-84e51889\" class=\"vce-image-gallery-item-inner\"><img decoding=\"async\" class=\"vce-image-gallery-img\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-6.png\" alt=\"\" title=\"image\"><\/a><\/figure><\/div><div class=\"vce-image-gallery-item\"><figure class=\"vce-image-gallery-item-inner-wrapper\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-4.jpg\" data-lightbox=\"lightbox-84e51889\" class=\"vce-image-gallery-item-inner\"><img decoding=\"async\" class=\"vce-image-gallery-img\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-4.jpg\" alt=\"\" title=\"image\"><\/a><\/figure><\/div><div class=\"vce-image-gallery-item\"><figure class=\"vce-image-gallery-item-inner-wrapper\"><a href=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-4-1.jpg\" data-lightbox=\"lightbox-84e51889\" class=\"vce-image-gallery-item-inner\"><img decoding=\"async\" class=\"vce-image-gallery-img\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-4-1.jpg\" alt=\"\" title=\"image (4)\"><\/a><\/figure><\/div><\/div><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-81304f5e\" data-vce-do-apply=\"all el-81304f5e\"><p><span style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">Geological radar is a geophysical prospecting method based on the propagation and reflection of electromagnetic waves.<\/span><\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">LTPS's department of geophysical tests has the following electromagnetic equipment (Geo Radar):<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 SIR-20 unit branded GSSI;<\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 Antennas of various frequencies<\/span><\/p>\n<dl>\n<dd>\n<table width=\"100%\" cellspacing=\"0\" cellpadding=\"9\">\n<tbody>\n<tr>\n<td bgcolor=\"#acb9ca\" width=\"95\" height=\"5\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">Application<\/span><\/p>\n<\/td>\n<td bgcolor=\"#acb9ca\" width=\"88\">\n<p align=\"center\"><span style=\"font-size: inherit; font-family: inherit;\">Antenna<\/span><\/p>\n<\/td>\n<td bgcolor=\"#acb9ca\" width=\"182\">\n<p align=\"center\"><span style=\"font-size: inherit; font-family: inherit;\">Investigation depth<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#fbe4d5\" width=\"95\">\n<p align=\"center\"><span style=\"font-size: inherit; font-family: inherit;\">Concrete<\/span><\/p>\n<\/td>\n<td bgcolor=\"#fbe4d5\" width=\"88\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">2.6 GHz<\/span><\/p>\n<\/td>\n<td bgcolor=\"#fbe4d5\" width=\"182\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">0-0.3 m<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"2\" bgcolor=\"#bfbfbf\" width=\"95\">\n<p align=\"center\"><span style=\"font-size: inherit; font-family: inherit;\">Road<\/span><\/p>\n<\/td>\n<td bgcolor=\"#bfbfbf\" width=\"88\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">2 GHz<\/span><\/p>\n<\/td>\n<td bgcolor=\"#bfbfbf\" width=\"182\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">0-0.5 m<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#bfbfbf\" width=\"88\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">1 GHz<\/span><\/p>\n<\/td>\n<td bgcolor=\"#bfbfbf\" width=\"182\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">0-1 m<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td rowspan=\"3\" bgcolor=\"#dbdbdb\" width=\"95\">\n<p align=\"center\"><span style=\"font-size: inherit; font-family: inherit;\">Geology<\/span><\/p>\n<\/td>\n<td bgcolor=\"#dbdbdb\" width=\"88\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">400 MHz<\/span><\/p>\n<\/td>\n<td bgcolor=\"#dbdbdb\" width=\"182\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">0-4 m<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#dbdbdb\" width=\"88\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">200 MHz<\/span><\/p>\n<\/td>\n<td bgcolor=\"#dbdbdb\" width=\"182\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">0-8 m<\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td bgcolor=\"#dbdbdb\" width=\"88\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">100 MHZ<\/span><\/p>\n<\/td>\n<td bgcolor=\"#dbdbdb\" width=\"182\">\n<p align=\"center\"><span style=\"font-family: inherit; font-size: inherit;\">0-20 m<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/dd>\n<\/dl>\n<ul>\n<li>\n<p><span style=\"font-family: inherit; font-size: inherit;\">Logiciel de traitement tr\u00e8s performant (RADAN 6.0)&nbsp;;<\/span><\/p>\n<\/li>\n<\/ul><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-84cf1b3e\" data-vce-do-apply=\"all el-84cf1b3e\"><p style=\"text-align: left;\" align=\"center\"><span style=\"color: #ff0000; font-family: inherit; font-size: inherit;\"><b>Scope<img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-2005 alignright\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-3-2.png\" alt=\"\" width=\"176\" height=\"147\"><\/b><\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"color: #000000; font-family: inherit; font-size: inherit;\">-A transmitting antenna sends very short pulses into the ground or civil structure at frequencies ranging from 16 MHz to 2.6 GHz. <\/span><\/p>\n<p style=\"text-align: left;\"><span style=\"color: #000000; font-family: inherit; font-size: inherit;\">-When waves encounter contact between two horizons with different dielectric permittivities, some of their energy is reflected, while some penetrate more deeply. - A receiving antenna receives the directed, reflected, and refracted waves.<\/span><\/p><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-95665748\" data-vce-do-apply=\"all el-95665748\"><p><span style=\"color: #ff0000;\"><strong><span style=\"font-size: inherit; font-family: inherit;\">It is applied in&nbsp;:<\/span><\/strong><\/span><\/p>\n<ul>\n<li><span style=\"font-size: inherit; font-family: inherit;\"><span lang=\"en-US\">Pavement surveying (measuring thicknesses, anomalies, etc.);<\/span><\/span><\/li>\n<li>Underground network detection (cables, pipes, metal objects, etc.);<\/li>\n<li>Archaeology and geology (cavities, basement, etc.);<\/li>\n<li>Concrete and bridge deck surveying (detection of reinforcement, etc.);<\/li>\n<\/ul>\n<p style=\"text-align: left;\" align=\"center\"><span style=\"color: #ff0000; font-family: inherit; font-size: inherit;\"><b>What does Geo Radar measure?<\/b><\/span><\/p>\n<ul>\n<li><span style=\"font-size: inherit; font-family: inherit;\"><span lang=\"en-US\">GPR measures the trip time and amplitude of reflected, transmitted, and\/or refracted EM waves between the transmitter and the receiver.<\/span><\/span><\/li>\n<li><span style=\"font-size: inherit; font-family: inherit;\">The amplitude and trip time of EM waves depends on the permittivity and conductivity of the horizon they pass through.<\/span><\/li>\n<li><span style=\"font-size: inherit; font-family: inherit;\">The amplitude of an EM wave measured at the receiver depends primarily on permittivity contrasts.<\/span><\/li>\n<\/ul><\/div><\/div><div class=\"vce-row-container\" data-vce-boxed-width=\"true\"><div class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" id=\"el-50744aef\" data-vce-do-apply=\"all el-50744aef\"><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-0ca0a08b\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-0ca0a08b\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-0ca0a08b\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-109805ee\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-109805ee\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 15px; font-weight: 600; font-style: normal;\">Auscultation g\u00e9ologique<\/p><\/div><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-43dbe978\" data-vce-do-apply=\"all el-43dbe978\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 283px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 77.3852%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"283\" height=\"219\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-1-2-283x219.jpg 283w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-1-2-283x219.jpg\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-1-2.jpg\" data-attachment-id=\"2011\"  alt=\"\" title=\"image (1)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first\" id=\"el-7bf8691a\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-7bf8691a\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-7bf8691a\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-db62b9b5\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-db62b9b5\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 15px; font-weight: 600; font-style: normal;\">Auscultation des b\u00e9tons<\/p><\/div><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-1a870e72\" data-vce-do-apply=\"all el-1a870e72\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 262px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 61.0687%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"262\" height=\"160\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-4-1-262x160.png 262w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-4-1-262x160.png\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-4-1.png\" data-attachment-id=\"2008\"  alt=\"\" title=\"image (4)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first\" id=\"el-ed77cf05\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-ed77cf05\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-ed77cf05\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-db6bbbd8\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-db6bbbd8\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 15px; font-weight: 600; font-style: normal;\">Auscultation des chauss\u00e9es <\/p><\/div><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-06d74449\" data-vce-do-apply=\"all el-06d74449\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 285px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 77.5439%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"285\" height=\"221\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-2-2-285x221.jpg 285w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-2-2-285x221.jpg\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-2-2.jpg\" data-attachment-id=\"2014\"  alt=\"\" title=\"image (2)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last\" id=\"el-8e6ce4bc\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-8e6ce4bc\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-8e6ce4bc\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-9b38c8af\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-9b38c8af\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 15px; font-weight: 600; font-style: normal;\">D\u00e9tection des r\u00e9seaux sous terrain<\/p><\/div><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-917bb406\" data-vce-do-apply=\"all el-917bb406\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 262px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 61.4504%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"262\" height=\"161\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-3-262x161.jpg 262w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-3-262x161.jpg\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-3.jpg\" data-attachment-id=\"2017\"  alt=\"\" title=\"image (3)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-left vce-google-fonts-heading--color-b-0-0-0--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Lora\"><div id=\"el-9172a8a6\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-9172a8a6\"><h2 class=\"vce-google-fonts-heading-inner\" style=\"font-size: 25px; line-height: 1.5; font-weight: 400; font-style: normal;\">SEISMIC PROSPECTING<\/h2><\/div><\/div><\/div><div class=\"vce vce-separator-container vce-separator--align-left vce-separator--style-solid\" id=\"el-b1814be6\" data-vce-do-apply=\"margin el-b1814be6\"><div class=\"vce-separator vce-separator--color-b-255-0-0 vce-separator--width-20 vce-separator--thickness-5\" data-vce-do-apply=\"border padding background  el-b1814be6\"><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-left\"><div class=\"vce vce-single-image-wrapper\" id=\"el-cf72f8f5\" data-vce-do-apply=\"all el-cf72f8f5\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 371px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 95.9569%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"371\" height=\"356\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-5-320x307.jpg 320w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-5-371x356.jpg 371w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-5-371x356.jpg\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-5.jpg\" data-attachment-id=\"2048\"  alt=\"\" title=\"image\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-fc3034ec\" data-vce-do-apply=\"all el-fc3034ec\"><p><span style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">Seismic methods are based on the study of ground mechanical wave propagation. Wave propagation velocity depends on the elastic properties of the materials.<\/span><\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">The LTPS\u2019s department of Special Tests is equipped with:<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 <span lang=\"en-US\">Seismogram branded DAQ Link 3;<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 <span lang=\"en-US\">Two 12-track coils (up to 10 meters);<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 <span lang=\"en-US\">Downhole well probes;<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 <span lang=\"en-US\">Crosshole seismic source;<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 <span lang=\"en-US\">processing and interpretation software of High-performance (SeisImager)<\/span><\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">The seismic prospecting method is applicable for:<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 <span lang=\"en-US\">Determining layer velocities and thicknesses;<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 Measuring dynamic moduli;<\/span><\/p><\/div><\/div><div class=\"vce-text-block\"><div class=\"vce-text-block-wrapper vce\" id=\"el-dd48c6eb\" data-vce-do-apply=\"all el-dd48c6eb\"><p><span style=\"color: #ff0000; font-family: inherit; font-size: inherit;\"><b>Scope<img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-2051 alignright\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-7-300x180.png\" alt=\"\" width=\"300\" height=\"180\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-7-300x180.png 300w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-7-320x192.png 320w, https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-7.png 350w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/b><\/span><\/p>\n<p><span style=\"color: #000000; font-family: inherit; font-size: inherit;\">The principle of the seismic method consists of causing a ground tremor using a source (hammer, dynamite, etc.) that creates a vibration wave that propagates in all directions. Then, using geophones, the arrival of some waves (compression, shear, etc.) is recorded.<\/span><\/p>\n<p>&nbsp;<\/p>\n<p><span style=\"color: #ff0000; font-family: inherit; font-size: inherit;\"><b>Different Techniques<\/b><\/span><\/p>\n<p><span style=\"font-family: inherit; font-size: inherit;\"><span lang=\"en-US\">LTPS's department of Special Tests offers three different seismic techniques:<\/span><\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 Seismic Refraction<\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 Downhole<\/span><\/p>\n<p><span style=\"font-size: inherit; font-family: inherit;\">\u2022 Crosshole<\/span><\/p><\/div><\/div><div class=\"vce-row-container\" data-vce-boxed-width=\"true\"><div class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" id=\"el-c61d61df\" data-vce-do-apply=\"all el-c61d61df\"><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-aa6babfc\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-aa6babfc\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-aa6babfc\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-4a008407\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-4a008407\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 17px; font-weight: 600; font-style: normal;\">Sismique Refraction<\/p><\/div><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-dec145cc\" data-vce-do-apply=\"all el-dec145cc\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 262px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 79.0076%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"262\" height=\"207\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-1-2-262x207.png 262w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-1-2-262x207.png\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-1-2.png\" data-attachment-id=\"2039\"  alt=\"\" title=\"image (1)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first\" id=\"el-34d74043\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-34d74043\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-34d74043\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-96d7ac4e\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-96d7ac4e\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 17px; font-weight: 600; font-style: normal;\">Down Hole<\/p><\/div><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-449bb87e\" data-vce-do-apply=\"all el-449bb87e\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 312px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 68.2692%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"312\" height=\"213\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-2-1-312x213.png 312w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-2-1-312x213.png\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-2-1.png\" data-attachment-id=\"2042\"  alt=\"\" title=\"image (2)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last\" id=\"el-4f5c89fa\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-4f5c89fa\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-4f5c89fa\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-2127c812\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-2127c812\"><p class=\"vce-google-fonts-heading-inner\" style=\"font-size: 17px; font-weight: 600; font-style: normal;\">Cross Hole<\/p><\/div><\/div><\/div><div class=\"vce-single-image-container vce-single-image--align-center\"><div class=\"vce vce-single-image-wrapper\" id=\"el-233e1233\" data-vce-do-apply=\"all el-233e1233\"><figure><div class=\"vce-single-image-figure-inner\" style=\"width: 291px;\"><div class=\"vce-single-image-inner vce-single-image--absolute\" style=\"width: 100%; padding-bottom: 70.4467%;\"><img loading=\"lazy\" decoding=\"async\" class=\"vce-single-image\"  width=\"291\" height=\"205\" srcset=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-3-3-291x205.png 291w\" src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/06\/image-3-3-291x205.png\" data-img-src=\"https:\/\/ltps.dz\/wp-content\/uploads\/2025\/04\/image-3-3.png\" data-attachment-id=\"2045\"  alt=\"\" title=\"image (3)\" \/><\/div><\/div><figcaption hidden=\"\"><\/figcaption><\/figure><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-row-container\" data-vce-boxed-width=\"true\"><div class=\"vce-row vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" id=\"el-9e2ad9cb\" data-vce-do-apply=\"all el-9e2ad9cb\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-col--md-auto vce-col--xs-1 vce-col--xs-last vce-col--xs-first vce-col--sm-last vce-col--sm-first vce-col--md-last vce-col--lg-last vce-col--xl-last vce-col--md-first vce-col--lg-first vce-col--xl-first\" id=\"el-e845dabb\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-e845dabb\"><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-e845dabb\"><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-center vce-google-fonts-heading--color-b-0-0-0--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Lora\"><div id=\"el-7202f2a6\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-7202f2a6\"><h2 class=\"vce-google-fonts-heading-inner\" style=\"font-size: 30px; line-height: 1.5; font-weight: 400; font-style: normal;\">WHY WORK WITH US?<\/h2><\/div><\/div><\/div><div class=\"vce vce-separator-container vce-separator--align-center vce-separator--style-solid\" id=\"el-2ef48f72\" data-vce-do-apply=\"margin el-2ef48f72\"><div class=\"vce-separator vce-separator--color-b-255-0-0 vce-separator--width-20 vce-separator--thickness-5\" data-vce-do-apply=\"border padding background  el-2ef48f72\"><\/div><\/div><div class=\"vce-row-container\" data-vce-boxed-width=\"true\"><div class=\"vce-row vce-row--has-col-background vce-row--col-gap-30 vce-row-equal-height vce-row-content--top\" id=\"el-2b5efa1f\" data-vce-do-apply=\"all el-2b5efa1f\"><div class=\"vce-row-content\" data-vce-element-content=\"true\"><div class=\"vce-col vce-element--has-background vce-col--xs-100p vce-col--xs-visible vce-col--xs-last vce-col--xs-first vce-col--sm-50p vce-col--sm-visible vce-col--sm-first vce-col--md-25p vce-col--md-visible vce-col--md-first vce-col--lg-25p vce-col--lg-visible vce-col--lg-first vce-col--xl-25p vce-col--xl-visible vce-col--xl-first\" id=\"el-86710674\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-86710674\" vce-box-shadow=\"el-86710674\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-86710674\"><div class=\"vce-features vce-var-icon vce-features--style-none vce-features--size-small\" style=\"--iconAlignment: left; --iconColor: rgb(255, 0, 0); --iconColorHover: rgb(255, 0, 0); --shapeColor: #3cb878; --shapeColorHover: #3cb878; --linkColorHover: #36a56b;\"><div id=\"el-a0d3dd42\" class=\"vce vce-features-icon-wrapper\" data-vce-do-apply=\"all el-a0d3dd42\"><div class=\"vce-features--icon vce-icon\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 769 769\"><path stroke-width=\"25\" d=\"M565.755 696.27h-360l-180-311.77 180-311.77h360l180 311.77z\"><\/path><\/svg><span class=\"vce-icon-container fas fa-suitcase\"><\/span><\/div><\/div><\/div><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-left vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-661b8844\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-661b8844\"><div class=\"vce-google-fonts-heading-inner\" style=\"font-size: 16px; line-height: 1.5; font-weight: 600; font-style: normal;\">More than 40 years of experience in the field.<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-element--xl--has-background vce-element--lg--has-background vce-element--md--has-background vce-element--sm--has-background vce-element--xs--has-background vce-col--xs-100p vce-col--xs-visible vce-col--xs-last vce-col--xs-first vce-col--sm-50p vce-col--sm-visible vce-col--sm-last vce-col--md-25p vce-col--md-visible vce-col--lg-25p vce-col--lg-visible vce-col--xl-25p vce-col--xl-visible\" id=\"el-a50d9821\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-a50d9821\" vce-box-shadow=\"el-a50d9821\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-a50d9821\"><div class=\"vce-features vce-var-icon vce-features--style-none vce-features--size-small\" style=\"--iconAlignment: left; --iconColor: rgb(255, 0, 0); --iconColorHover: rgb(255, 0, 0); --shapeColor: #3cb878; --shapeColorHover: #3cb878; --linkColorHover: #36a56b;\"><div id=\"el-9805d645\" class=\"vce vce-features-icon-wrapper\" data-vce-do-apply=\"all el-9805d645\"><div class=\"vce-features--icon vce-icon\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 769 769\"><path stroke-width=\"25\" d=\"M565.755 696.27h-360l-180-311.77 180-311.77h360l180 311.77z\"><\/path><\/svg><span class=\"vce-icon-container fas fa-sitemap\"><\/span><\/div><\/div><\/div><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-left vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-04498355\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-04498355\"><div class=\"vce-google-fonts-heading-inner\" style=\"font-size: 16px; line-height: 1.5; font-weight: 600; font-style: normal;\">Specialists in your business<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-element--xl--has-background vce-element--lg--has-background vce-element--md--has-background vce-element--sm--has-background vce-element--xs--has-background vce-col--xs-100p vce-col--xs-visible vce-col--xs-last vce-col--xs-first vce-col--sm-50p vce-col--sm-visible vce-col--sm-first vce-col--md-25p vce-col--md-visible vce-col--lg-25p vce-col--lg-visible vce-col--xl-25p vce-col--xl-visible\" id=\"el-1203c7ce\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-1203c7ce\" vce-box-shadow=\"el-1203c7ce\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-1203c7ce\"><div class=\"vce-features vce-var-icon vce-features--style-none vce-features--size-small\" style=\"--iconAlignment: left; --iconColor: rgb(255, 0, 0); --iconColorHover: rgb(255, 0, 0); --shapeColor: #3cb878; --shapeColorHover: #3cb878; --linkColorHover: #36a56b;\"><div id=\"el-83e94a53\" class=\"vce vce-features-icon-wrapper\" data-vce-do-apply=\"all el-83e94a53\"><div class=\"vce-features--icon vce-icon\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 769 769\"><path stroke-width=\"25\" d=\"M565.755 696.27h-360l-180-311.77 180-311.77h360l180 311.77z\"><\/path><\/svg><span class=\"vce-icon-container fas fa-globe\"><\/span><\/div><\/div><\/div><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-left vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-eb6aef9e\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-eb6aef9e\"><div class=\"vce-google-fonts-heading-inner\" style=\"font-size: 16px; line-height: 1.5; font-weight: 600; font-style: normal;\">Greater proximity<\/div><\/div><\/div><\/div><\/div><\/div><\/div><div class=\"vce-col vce-element--xl--has-background vce-element--lg--has-background vce-element--md--has-background vce-element--sm--has-background vce-element--xs--has-background vce-col--xs-100p vce-col--xs-visible vce-col--xs-last vce-col--xs-first vce-col--sm-50p vce-col--sm-visible vce-col--sm-last vce-col--md-25p vce-col--md-visible vce-col--md-last vce-col--lg-25p vce-col--lg-visible vce-col--lg-last vce-col--xl-25p vce-col--xl-visible vce-col--xl-last\" id=\"el-1728c5e6\"><div class=\"vce-col-inner\" data-vce-do-apply=\"border margin background  el-1728c5e6\" vce-box-shadow=\"el-1728c5e6\"><div class=\"vce-content-background-container\"><\/div><div class=\"vce-col-content\" data-vce-element-content=\"true\" data-vce-do-apply=\"padding el-1728c5e6\"><div class=\"vce-features vce-var-icon vce-features--style-none vce-features--size-small\" style=\"--iconAlignment: left; --iconColor: rgb(255, 0, 0); --iconColorHover: rgb(255, 0, 0); --shapeColor: #3cb878; --shapeColorHover: #3cb878; --linkColorHover: #36a56b;\"><div id=\"el-bc4283ec\" class=\"vce vce-features-icon-wrapper\" data-vce-do-apply=\"all el-bc4283ec\"><div class=\"vce-features--icon vce-icon\"><svg xmlns=\"https:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 769 769\"><path stroke-width=\"25\" d=\"M565.755 696.27h-360l-180-311.77 180-311.77h360l180 311.77z\"><\/path><\/svg><span class=\"vce-icon-container far fa-thumbs-up\"><\/span><\/div><\/div><\/div><div class=\"vce-google-fonts-heading vce-google-fonts-heading--align-left vce-google-fonts-heading--color-empty--45--5C00FF--FF7200 vce-google-fonts-heading--font-family-Poppins\"><div id=\"el-c0fd1dc9\" class=\"vce-google-fonts-heading-wrapper\"><div class=\"vce-google-fonts-heading--background vce\" data-vce-do-apply=\"border background  padding margin el-c0fd1dc9\"><div class=\"vce-google-fonts-heading-inner\" style=\"font-size: 16px; line-height: 1.5; font-weight: 600; font-style: normal;\">More comprehensive services<\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Surface geophysics in geotechnics encompasses a set of non-destructive methods used to explore the subsurface first few tens of meters. It plays a crucial role in site investigation prior to construction works by providing information on the nature, structure, and mechanical state of soils. These techniques complement traditional drilling techniques by offering a comprehensive and [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":2336,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[],"class_list":["post-1930","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-services-en"],"_links":{"self":[{"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/posts\/1930","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/comments?post=1930"}],"version-history":[{"count":2,"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/posts\/1930\/revisions"}],"predecessor-version":[{"id":2578,"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/posts\/1930\/revisions\/2578"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/media\/2336"}],"wp:attachment":[{"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/media?parent=1930"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/categories?post=1930"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ltps.dz\/en\/wp-json\/wp\/v2\/tags?post=1930"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}