复杂地质条件隧洞开挖超前地质预报实践与应用

Practice and Application of Advanced Geological Prediction for Tunnel Excavation under Complex Geological Conditions

三亚市西水中调工程输水隧洞长约28.1 km,穿越断层、破碎带,地质条件复杂。为探明沿线隧洞地质状况,应用地质雷达探测、隧道层析成像(TRT)和隧道地震波成像(TST)技术进行超前地质预报,探测分析掌子面前方地质状况,确保施工作业安全。通过现场多次实践证明,地质雷达探测和隧道地震波成像(TST)技术操作方便,比较准确地预测了沿线隧洞地质状况,开挖揭露情况与探测成果接近,值得推广应用。

The water-conveyance tunnel of the West-to-Central Water Diversion Project in Sanya City is about 28.1 km long,crossing faults and fracture zones,and the geological conditions are complex.In order to explore the geological conditions of the tunnel along the line,the technologies of geological radar detection,tunnel reflection tomography(TRT)and tunnel seismic tomography(TST)are used to carry out the advanced geological prediction,and the geological conditions in front of the working face are detected and analyzed to ensure the safety of construction.The practice has proved that the geological radar detection and TST technology are easy to operate,and the geological conditions of tunnels along the line are accurately predicted.The excavation exposure is close to the detection results,which is worthy of popularization and application.