Geotechnical investigations

Jun 30th, 2015
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1.Geotechnical investigations are performed by geotechnical engineers or engineering geologists to obtain information on the physical properties of soil and rock around a site to design earthworks and foundations for proposed structures and for repair of distress to earthworks and structures caused by subsurface conditions.

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1.Geotechnical investigationsare performed bygeotechnical engineersorengineering geologiststo obtain information on the physical properties of soil and rock around a site to designearthworksandfoundationsfor proposed structures and for repair of distress to earthworks and structures caused by subsurface conditions. This type of investigation is called a site investigation. Additionally,geotechnical investigationsare also used to measure thethermal resistivityof soils or backfill materials required for underground transmission lines, oil and gas pipelines, radioactive waste disposal, and solar thermal storage facilities. A geotechnical investigation will include surface exploration and subsurface exploration of a site. Sometimes,geophysical methodsare used to obtain data about sites. Subsurface exploration usually involves soil sampling and laboratory tests of the soil samples retrieved.Surface exploration can includegeologic mapping, geophysical methods, andphotogrammetry, or it can be as simple as a geotechnical professional walking around on the site to observe the physical conditions at the site.To obtain information about the soil conditions below the surface, some form of subsurface exploration is required. Methods of observing the soils below the surface, obtaining samples, and determining physical properties of the soils and rocks include test pits, trenching (particularly for locatingfaultsandslide planes), boring, and

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