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Geotechnical Site Characterization by Anirban De

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CHAPTER 4

IN-SITU GEOTECHNICAL EXPLORATION AND SAMPLING METHODS

In-situ geotechnical tests are used to measure the response of subsurface soil layers to some mechanical disturbance, based on which physical engineering properties such as strength or stiffness of the soil can be estimated. All such tests are considered destructive since they apply medium to large deformations on the soil during testing.

In-situ geotechnical tests can be conducted at different depths below ground surface. Some tests require a borehole to be drilled, through which the test device is lowered. The borehole installation itself is an exploratory process, during which samples can be taken and soil strata be identified.

Other tests are considered “direct-push” technologies ...

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