TRT技术在某隧道超前地质预报中的应用研究

Research on Application of TRT Technology in Advanced Geological Prediction of a Tunnel

近些年随着国内各种大型基建项目的建设,超前地质预报技术已经成为用来预测隧道掌子面前方围岩地质缺陷类型的重要手段之一。在众多超前地质预报技术中,TRT超前地质预报技术以其成本较低廉、操作简单、安全性高等优点受到广泛的关注与应用。文章对TRT超前地质预报技术的基本原理、仪器的布置进行了介绍,着重阐述了不同缺陷所对应的回波信号的类型,并以回波信号理论为基础,对叶巴滩水电站花岗岩隧道的TRT隧道超前预报资料进行分析,从而为叶巴滩水电站某隧道施工方案与安全措施的制定提供理论支撑。

In recent years,with the construction of various large infrastructure projects in China,advanced geological prediction technology has become one of the important means to predict the geological defect types of surrounding rock in front of tunnel face.Among many advanced geological prediction technologies,TRT advanced geological prediction technology has been widely concerned and applied for its advantages of low cost,simple operation and high safety.In this paper,the basic principle and instrument arrangement of TRT advanced geological prediction technology are introduced,and the types of echo signals corresponding to different defects are emphatically expounded.Based on the echo signal theory,the TRT tunnel advanced prediction data of granite tunnel in Yebatan Hydropower Station are analyzed,so as to provide theoretical support for the formulation of construction scheme and safety measures of a tunnel in Yebatan Hydropower Station.