闪长岩隧道TSP数据处理中V_P/V_S值的选取

Selection of the V_P/V_S in TSP-Data Processing of the Diorite Tunnel

对照某铁路隧道开挖后的地质信息,反复对TSP超前预报资料进行处理分析,对VP/VS值在TSP资料处理中的重要性及对处理结果的影响有了新的认识。结合应用实例分析,得出了TSP数据处理过程中VP/VS合理的取值原则,在总结大量成果参数的基础上,得出了不同岩体纵波波速(VP)下,VP/VS值、泊松比δ及动态杨氏模量Ed等物性参数的对应关系、变化范围及VP与VP/VS的线性相关图,并且进一步提出了在闪长岩地层中VP/VS值的试算方法,为今后类似地质条件下的隧道工程TSP超前预报数据处理工作中VP/VS取值提供有利的理论及实践依据。

Based on the comparison of the tunnel geological information after excavation and processing of TSP-Data time and time again,we deeply recognized the importance of the VP/VSin TSP-Data processing and the effect on the processing results.In addition,through the analysis of application examples,we proposed a reasonable value principle of VP/VS in TSP-Data processing and based on the summary of the parameters in a large number of the processing results,we also proposed the corresponding relations,range of the VP/VS,Poisson’s ratio,dynamic Young’s modulus and the linear correlation graph of VP—VP/VS under the different P-wave velocity.And we further proposed the trial method of selecting VP/VS in the diorite formation,which can provide the theory and practice basis for selecting the appropriate VP/VS in TSP-Data processing for the similar tunnel in the future.