TSP超前预报数值模拟及其在山西某隧道中的应用研究

Numerical Simulation of TSP Advanced Forecast and Its Application in a Tunnel in Shanxi Province

在隧道开挖的过程中,利用地震弹性波反射波法(Tunnel Seismic Prediction, TSP)对掌子面前方围岩的状况进行预报,可以有效地防止事故的发生,加快工程进度,降低成本,因此合理运用TSP超前预报系统对于隧道的安全施工具有重要意义。本文在介绍了TSP的基本原理的基础上,开展了隧道前方含低速异常体的TSP超前预报数值模拟,分析了异常体的地震波场响应特征,随后总结归纳了波速的影响因素。随后以山西某隧道TSP超前探测为例,推断了隧道前方的围岩情况,并通过现场开挖情况分析了该方法的应用效果,研究成果为该隧道以及类似隧道的安全施工提供有力保障。

In the process of tunnel excavation, Tunnel Seismic Prediction (TSP) is used to forecast the surrounding rock in front of the face, which can effectively prevent the occurrence of accidents, accelerate the progress of the project, and reduce the cost. Therefore, the reasonable application of TSP advanced prediction system is of great significance to the safe construction of tunnels. On the basis of introducing the basic principle of TSP, this paper carries out numerical simulation of TSP advanced prediction with low velocity abnormal body in front of tunnel, analyzes the characteristics of seismic wave field response of abnormal body, and then summarizes the influencing factors of wave velocity. Then, taking the TSP advanced detection of a tunnel in Shanxi Province as an example, the surrounding rock situation in front of the tunnel is inferred, and the application effect of the method is analyzed through the field excavation. The research results provide a strong guarantee for the safe construction of the tunnel and similar tunnels.