Investigation on the technique for ShenChang Village fault survey in inclined shaft of FuXing tunnel

摘要

Faults and their fracture zone are familiar adverse geological phenomena in the process of tunnel excavation. When tunnels cross the fault fracture zone, the sudden accident happens frequently because of complex geological formations and changefully geological conditions. Therefore, it's essential for safe construction of tunnel to identify the location of fault and distribution of fracture zone, then take appropriate measures to prevent the sudden inrush of water and mud and accidents of rooffall and collapse. The TRT(Tunnel Reflection Tomography)6000 system is a new kind of geological predication method which use seismic waves reflection principle and rock-soil mass vision 3D TM technology,and it has been rarely used in China. The operation principle and theory of the TRT6000 system is introduced, and its application to the ShenChang Village fault survey in inclined shaft of FuXing tunnel for DaLi-RuiLi railway assisted with engineering geological analysis is discussed. It is found that the predicted results are conformable with the actual situation and can provide reasonable proposals for safe construction.