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石棉隧道位于雅安-西昌高速公路中段,断裂发育,地质构造复杂,岩体破碎。施工中为减少和避免地质灾害发生采用了TST超前预报技术。应用结果表明TST技术采用空间观测系统有效地提高了速度分析精度和构造定位精度,应用二维滤波技术有效地消除了面波和侧向回波,成功地解决了断层、破碎带、含水带的超前预报问题。
The asbestos tunnel is located in the middle section of Ya’an - Xichang Expressway with developed faults, complicated geological structures and broken rock mass. During construction, TST advanced forecasting technology was adopted to reduce or avoid geological disasters. The application results show that the TST technology uses the space observation system to effectively improve the accuracy of the velocity analysis and the construction of the positioning accuracy. The two-dimensional filter technique is used to effectively eliminate the surface waves and lateral echoes and successfully solve the faults, broken zones, water-bearing zones Advance forecast problem.