Regression Based Correlation between SPT-N and Geoelectrical Data of Subsurface in India

Résumé fourni par la source

Summary Electrical Resistivity Tomography (ERT) in integration with the borehole investigation provides a more effective approach to investigate the subsurface. The correlation between ERT and borehole investigation is inadequate which prevents the conversion of electrical resistivity into the engineering properties of soil and vice versa. The present study aims at developing a correlation between borehole investigation and ERT of a site in India. Borehole investigations are conducted by drilling seven boreholes at specific points to obtain the SPT- Nꞌ values and assess the engineering properties of the soil at the site in India. The resistivity profile of subsurface layers has been obtained through five ERT profiles. Results show that only one borehole exhibits a good correlation between Nꞌ (corrected SPT values) with resistivity among all the boreholes. However, two borehole shows a good correlation between Nꞌ and transverse resistivity among all the boreholes. The study recommends the use of more numbers ERT profiles and boreholes to improve the proposed correlation. The study highlights the usefulness of geophysical testing and the requirement for further research on it.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.