数值模拟在高黎贡山隧道TBM施工段断层破碎带TSP探测中的应用  

Application of Numerical Simulation in TSP Detection of Fault Fracture Zone in TBM Construction Section of Gaoligongshan Tunnel

作　　者：汪文强 张新平 宋振东 Wang Wenqiang;Zhang Xinping;Song Zhendong(China Railway Eryuan Engineering Group Co.Ltd,Chengdu Sichuan,610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《工程地球物理学报》2020年第6期780-786,共7页Chinese Journal of Engineering Geophysics

摘　　要：大瑞铁路高黎贡山隧道出口段采用TBM施工,施工过程中在断层破碎带附近遭遇多次卡机,严重影响施工进度。为了研究卡机段围岩的地震波场传播规律及对卡机段的影响,基于Tesseral 2D对断层破碎带附近卡机段TSP法进行数值模拟,并与实际卡机段TSP法预报结果相对比,得出以下结论和成果:一是利用Tesseral 2D对TSP法进行数值模拟,观察地震波在断层卡机段传播规律,证明了TSP法在TBM卡机段超前预报的实用性,对实际数据采集有一定的参考意义;二是正演模拟中对断层宽度计算与实际模型存在一定偏差,分析为波场快照提取精度、断层模型边界过渡非线性和波阻抗差异过大导致,为实际TSP反演计算断层宽度提供了一定的参考。TBM construction was used in the exit section of Gaoligongshan tunnel of Dairui Railway,during which many machines were stuck near the fault fracture zone,seriously affecting the construction schedule.In order to study the lag period of the seismic wave field propagation law of the surrounding rock of the jammed section and its influence on the jammed section,based on Tesseral 2D,this paper numerically simulates the jammed section near the fault fracture zone using the TSP method,and compares it with the actual jammed section TSP prediction result.The results and conclusions are:1.Tesseral 2D numerically simulates the TSP method and observes the propagation law of seismic waves in the fault jam section,which proves the practicability of the TSP method in the advance prediction of the TBM jam section,and has a certain reference for actual data collection;2.In the forward simulation,a certain deviation is detected.between the calculation of the fault width and the actual model,The analysis provides reference for the actual TSP inversion calculation of fault width,caused by the snapshot accuracy of wave field,the nonlinear transition of fault model boundary and the excessively large difference in wave impedance.

关 键 词：数值模拟 TSP TBM卡机 

分 类 号：P631.4[天文地球—地质矿产勘探]