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顶效隧道位于汕头至昆明国家高速公路中段贵州境内,岩溶发育,地质构造复杂,岩体破碎。为了确保施工安全,减少和避免地质灾害发生,采用了TST技术对隧道进行超前预报。结果表明,TST技术采用空间观测系统和最大能量扫描技术有效地提高了速度分析精度和构造定位精度,应用二维方向滤波技术有效地消除了侧向回波和面波,成功地解决了断层、破碎带及含水带的地质超前预报问题。
Top efficient tunnel is located in the middle of Shantou to Kunming National Expressway in Guizhou Province, karst development, complex geological structure, rock crushing. In order to ensure the construction safety, reduce and avoid the occurrence of geological disasters, TST technology is used to predict the advance of the tunnel. The results show that the TST technique can effectively improve the accuracy of the velocity analysis and the constructional positioning accuracy by using the space observation system and the maximum energy scanning technique. By applying the two-dimensional directional filtering technology, the lateral echo and the surface wave are effectively eliminated, and the fault, Geological prediction of fractured zone and water-bearing zone.