Using ERI and MASW for Subsurface Characterization of Pile Road Embankments

This article explores the use of electrical resistivity imaging (ERI) and multichannel analysis of surface waves (MASW) for subsurface characterization of pile road embankments in Ayutthaya, Thailand. The study aims to assess the effectiveness of these geophysical techniques and identify any limitations or challenges faced during data collection and analysis. ERI is employed to evaluate changes in resistivity before and after pile installation, providing insights into variations in material properties. MASW is used to estimate shear wave velocities, particularly focusing on the impact of pile installation on subsurface strength. The results reveal significant changes in subsurface properties following pile installation, indicating variations in material rigidity and strength near the piles. However, challenges were encountered in accurately determining the depth of piles using ERI due to potential interference from off-plane objects. These findings highlight the importance of integrating multiple geophysical techniques for comprehensive subsurface characterization. Further research is recommended to address these limitations and enhance accuracy in assessing subsurface conditions for road embankments constructed on soft clay terrain.