TSP预报隧道不良地质体应用研究

Forecast defective geological bodies in tunnel by TSP

TSP(tunnel seismic prediction)数据采集质量是保证超前预报准确性的前提条件,为此在前人基础上进一步归纳总结了TSP数据采集应注意的问题,主要分析了炮孔、接收孔以及炮孔-接收孔关系等对TSP数据采集的影响.TSP对预报不良地质体具有良好的效果,本文分别列举了TSP对溶洞、松散破碎带以及软夹层等成功预报案例.通过对比TSP解译结果与隧道开挖实际地质情况发现,相同的岩石特性曲线,对应着不同的地质情况,有的地质情况可能存在重大安全隐患,而通过对该类曲线的分析总结为TSP结果解译提供参考和经验累积,有助于提高解译准确性.

TSP data acquisition quality is prerequisite of ensuring prediction accuracy,and items on this acquisition should be paid attention to are further summed on the basis of previous,focusing on analyzing the blast holes,the receiving holes and the relationship between blast and receiving holes in TSP data acquisition. That TSP has positive effect on forecasting bad geology is supported by cases that TSP successfully predict the Karst,loose and soft soils. By comparing TSP interpretation and actual geological conditions of tunnel excavation,it is found that the same characteristic curves correspond to different geological conditions,in some of which there might be significant hidden safety problems,yet that by analyzing this curves to provide reference and experience for TSP interpretation will contribute to improving the interpretation accuracy of TSP.