A Study on the Effectiveness of Various Geophysical Methods in Detecting Naturally Formed Cavities in Lateritic Deposit

Anbazhagan, P and Panjami, K (2023) A Study on the Effectiveness of Various Geophysical Methods in Detecting Naturally Formed Cavities in Lateritic Deposit. In: Indian Geotechnical Journal .

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Abstract

Timely identifying unknown cavities below ground can minimize associated consequences, but there is no straightforward method to detect cavities. This paper aims to study the effectiveness of the application of different geophysical methods for detecting naturally formed subsurface cavities in lateritic deposits. A comparative summary of the effectiveness of various geophysical survey techniques used to identify the cavities is presented. There are multiple reasons for subsurface cavity formation, and the physical properties of the materials change when these voids are filled with air, water, or other geologic materials. The anomalies due to changes in physical properties between cavity space and surrounding medium can be easily detected by geophysical techniques. The main three geophysical methods, ground penetrating radar, electrical resistivity survey and multichannel analysis of surface wave, are studied on their advantages and limitations in detecting subsurface cavities. A typical field study is presented from the soil piping-affected region of Kerala, India. Geophysical surveys were conducted in the study area, and the size and depth of the cavity were mapped by the integrated geophysical method. © 2023, The Author(s), under exclusive licence to Indian Geotechnical Society.

Item Type:	Journal Article
Publication:	Indian Geotechnical Journal
Publisher:	Springer
Additional Information:	The copyright for this article belongs to Springer.
Keywords:	Electric conductivity; Geological surveys; Geophysical prospecting; Geophysics; Ground penetrating radar systems; Soils; Surface waves, Cavity; Cavity formation; Electrical resistivity; Geophysical methods; Geophysical study; Geophysical surveys; Laterite soils; MASW; Straight-forward method; Survey techniques, Deposits
Department/Centre:	Division of Mechanical Sciences > Civil Engineering
Date Deposited:	04 Mar 2024 09:29
Last Modified:	04 Mar 2024 09:29
URI:	https://eprints.iisc.ac.in/id/eprint/84316

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