1887

Abstract

Summary

This study investigates drainage issues in a railroad tunnel using a 3D Direct Current Resistivity (DCR) survey. DCR data were acquired along three sidewall lines inside the tunnel using a multi-electrode system with pole-dipole (PD) and inverse Wenner-Schlumberger (WS) configurations. A total of 429 data points per line were collected. The datasets were jointly inverted using the 3D inversion algorithm. The resulting resistivity model identified a prominent low-resistivity zone, interpreted as a water-saturated zone contributing to the tunnel’s drainage problem. Based on the findings, the installation of boreholes and drainage canals was proposed to manage groundwater inflow. The results demonstrate the practical application of 3D DCR methods for diagnosing and mitigating subsurface water issues in tunnel environments.

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/content/papers/10.3997/2214-4609.202520246
2025-09-07
2026-02-15
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