综合地质预报在公路隧道施工中的应用

Application of Comprehensive Geological Forecast in Highway Tunnel Construction

针对单一隧道超前预报方法存在不确定性,特别是对复杂的围岩情况难以做出准确判断的问题,该文采用跨孔地震波CT和快速钻探综合分析方法进行超前预报,通过跨孔地震波CT成像与随钻监测系统采集的钻进深度与时间曲线分析两种预报方法相结合,避免了单一方法的片面性。通过楚大高速公路九顶山隧道超前地质预报结果表明,跨孔地震波CT法结合快速钻探法可相互验证和补充,提高了超前地质预报的准确性,值得推广应用。

In view of the uncertainty of single tunnel advance prediction method, especially the problem that it is difficult to make accurate judgment for complex surrounding rock conditions, this paper uses the cross hole seismic wave CT and fast drilling comprehensive analysis method to carry out advance prediction. The combination of cross hole seismic wave CT imaging and drilling depth and time curve analysis collected by MWD system avoides the one-sided by the single method.Through the geological prediction of Jiudingshan Tunnel on Chuda Expressway, the results show that the cross hole seismic wave CT method combined with fast drilling method can verify and supplement each other, it improves the accuracy of geological prediction, and is worthy of popularization and application.