What is Geo-technical Assessment?

Before we can start any construction on a site we need to know a lot of things about the area. We can’t just dig up and start laying the foundation without knowing whether the soil strata there will even support our intended structure. We also need to understand the availability of groundwater and other water bodies before we build residential structures to ensure that our structures are habitable.

Geo Technical Assessment:

A comprehensive report prepared by geo-technical engineers elucidating the above mentioned points coupled with metrictation form part and parcel of geo-technical assessment. During this process, an engineer would examine the site characterization, soil sample testing and laboratory testing.

Site Characterization and Setting

Geological setting and site characterization is a study of the type of soil sedimentation at the desired location where the structure would be built. It involves the preparation of the geological map of the site besides investigation of the soil zones, their classification and presence of the ground water.

Field Work
Field work in geo-technical assessment involves boring auger holes to perform dynamic penetration testing. It also involves multiple in site tests such as shear strength, comprehensibility, creation of test pits, sampling of materials for lab, and permeability and SPT tests.
Lab Report Preparation

Test samples from the site are analysed at laboratories with high-end equipment. Laboratory testing involves simple process like classification and index testing of soil to complex ones such as triaxial test. Investigation of gases, frozen soil within the sample are also done at this stage. Offshore laboratory testing includes vital information like water content, bulk and dry density and qualitative carbon component.

Conclusion

This is a generic view and outline of how geo-technical assessment is done. To get more idea on the various methods of field and lab test in geotechnical engineering keep visiting this space regularly.

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