Abstract The Tongluoshan tunnel on the Nanchong-Chongqing motorway passes through a coal seam, goaf and gi? ant fault zones with complicated geological conditions. It will very likely encounter the geological hazards of coal and gas outbursts and water inflow during construction. Considering that conventional prediction methods have their applicable conditions and advantages and disadvantages, it is difficult to make an accurate judgment of geological conditions by any single method, and so a comprehensive geological prediction system that combines tunnel reflection tomography (TRT), transient electromagnetic method (TEM) and ground penetrating radar (GPR) was implemented during construction of the Tongluoshan tunnel. The conditions of surrounding rock and underground water ahead of the working face were obtained based on mutual multi-parameter corroboration. This method provides safe and timely early warnings for tunnel construction and reliable technical supports for the determination and alteration of the construction scheme.
Abstract：
The Tongluoshan tunnel on the Nanchong-Chongqing motorway passes through a coal seam, goaf and gi? ant fault zones with complicated geological conditions. It will very likely encounter the geological hazards of coal and gas outbursts and water inflow during construction. Considering that conventional prediction methods have their applicable conditions and advantages and disadvantages, it is difficult to make an accurate judgment of geological conditions by any single method, and so a comprehensive geological prediction system that combines tunnel reflection tomography (TRT), transient electromagnetic method (TEM) and ground penetrating radar (GPR) was implemented during construction of the Tongluoshan tunnel. The conditions of surrounding rock and underground water ahead of the working face were obtained based on mutual multi-parameter corroboration. This method provides safe and timely early warnings for tunnel construction and reliable technical supports for the determination and alteration of the construction scheme.
.Application of a Comprehensive Geological Prediction System to Construction of the New Tongluoshan Tunnel[J] MODERN TUNNELLING TECHNOLOGY, 2017,V54(4): 207-212
2017, Vol. 54 