Two-dimensional electrical resistivity analysis for boulders detection

Abstract

Variety of methods has been used to determine the condition of ground profile these days. Conventional Boreholes and JKR probes has been used to predict the ground profile underneath and obtaining geotechnical parameter data for designing purposes. Profiling can be enhanced using two-dimensional Electrical Resistivity to conduct imaginary assessment profiling of specific ground condition. A soil investigation comprises of boreholes, probes and two dimensional resistivity test has been conducted through series of assessment before commencement of project rural road Jalan Masuk ke Kg Org Asli Chennah ke Kg Esok, Jempol, Negeri Sembilan. This project involved massive earthwork and construction of elevated structure through Hutan Simpan Lata Kijang. Prior to the existing site condition consist of boulders and erratic ground profile, the need for effective site investigation is highly considered. Conventional soil investigation method is inadequate to predict ground profile accurately in terms of bedrock profiling compared to two dimensional electrical resistivity methods. Therefore, combination of these methods hopefully can utilize the capabilities of each method in order to produce reasonable cost estimation and optimized design.