沪昆高速铁路朱砂堡1~#隧道超前地质预报方法研究

The Study on Application of Advanced Geological Prediction of 1~# Tunnel Named Zhushabao of HU-KUN High-Speed Railway

沪昆高速铁路朱砂堡1~#隧道不良地质问题及特殊岩土分布较多,特别是岩溶问题较为突出。为保证隧道施工安全,结合掌子面地质素描分析结果,分别采用地质雷达探测法、地震波预报技术(TSP)及红外探测法对朱砂堡1~#隧道开展超前地质预报工作。对比分析结果表明,三种预报方法对砂堡1~#隧道超前预报中准确性高低依次为:红外探测>地质雷达>TSP,但TSP的适用范围更为广泛;通过结合两种或两种以上预报方法进行预测,朱砂堡1~#隧道预报的成功率基本达到100%,开挖过程中没有发生一起围岩坍塌或突水突泥事件,取得了良好的预报效果,保障了隧道施工和工作人员的安全。

There are many adverse geological problems and special geotechnical distribution in Zhushabao 1~# tunnel of Shanghai-Kunming high-speed railway, especially the karst problem is outstanding. In order to ensure the safety of tunnel construction, combined with the results of the geotechnical sketch analysis of the face in the construction process,Ground Penetrating Radar（GPR）,Tunnel Seismic Prediction（TSP） and Infrared acquisition are respectively used to carry out the advanced geological prediction work on Zhushabao 1~# tunnel. Comparing with this tree methods, come in for Zhushabao 1~# tunnel advanced forecast accuracy level as follows ： Infrared acquisitionGPRTSP, but the TSP have a wider range of application. If the prediction by combining two or more forecasting methods, Zhushabao 1~# tunnel＇s forecasts success rate basically reached 100 percent, there is no country rock collapse incident during excavation,made a good prediction results,and the forecasting results have been achieved to ensure the safety of tunnel construction and staff.