|Table of Contents|

Application of Ground-airborne Transient Electromagnetic Method in Karst Exploration of Operational Highway Tunnels in Complex Terrain—Taking Hechi-Baise Highway in Guangxi, China as an Example(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2025年第01期
Page:
95-105
Research Field:
应用地球物理
Publishing date:

Info

Title:
Application of Ground-airborne Transient Electromagnetic Method in Karst Exploration of Operational Highway Tunnels in Complex Terrain—Taking Hechi-Baise Highway in Guangxi, China as an Example
Author(s):
SUN Nai-quan1; 2*;  LI Tian-xiang1; 2;  QI Zhi-peng1; 2;  CHENG Wang-sheng1; 2;  CAO Hua-ke1; 2
(1. School of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, Shaanxi, China; 2. Integrated Geophysical Simulation Lab(Key Laboratory of Chinese Geophysical Society), Chang'an University, Xi'an 710054, Shaanxi, China)
Keywords:
ground-airborne transient electromagnetic method;  complex terrain;  karst exploration;  tunnel;  geological hazard;  full domain apparent resistivity
PACS:
P631.3+25
DOI:
10.19814/j.jese.2024.05008
Abstract:
To address the risks posed by water and mud inrush in operational tunnels, which significantly threaten traffic safety, a novel detection technology based on ground-airborne transient electromagnetic method(GATEM)is proposed. This method is designed to enhance the precision and efficiency of detecting hazard sources and water-conducting channels. To overcome these limitations, GATEM integrates ground and airborne electromagnetic signals, eliminating constraints related to power supply and load, making it particularly suitable for detecting complex mountainous regions and tunnels. GATEM is applied to Jinlan tunnel on Hechi-Baise highway, combining resistivity imaging technology with a full-domain apparent resistivity calculation method based on inverse functions for detailed analysis of the tunnel area. This approach accurately identifies geological hazard sources and water-conducting channels by mapping the electrical properties of subsurface media. Compared to traditional apparent resistivity calculations, the inverse function-based full-domain definition significantly improves detection accuracy and depth. The results show that GATEM combined with full-domain apparent resistivity imaging, precisely locates low-resistivity zones in tunnels, providing critical technical support for disaster prevention and mitigation. This method exhibits broad application potential in complex terrains, enhancing both the safety and efficiency of geological surveys and offering a novel solution for geohazard mitigation in tunnel engineering.

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Last Update: 2025-01-20