综合预报技术在隧道岩溶探测预报中的应用研究

On the Application of Comprehensive Geological Forecasting Techniques to Karst Tunnels

岩溶涌突水和涌突泥灾害对隧道施工危害极大,因此对隧道穿越位置及其周边一定范围内岩溶发育分布及其充填性质的探测一直是隧道施工中地质超前预报亟待解决的难题。文章针对纳黔高速公路西湖2#隧道工程岩溶预报的成功范例,详细介绍了"以地质调查法为基础、以超前导洞法和电磁波反射法为主要手段"的综合预报技术,并对其在隧道施工期岩溶探测中的应用进行了分析研究。研究结果表明,综合预报技术对隧道岩溶的预测预报具有良好的效果,其预报结果可为动态施工提供科学依据。

Since karst water inflow and mud burst occurrences are very detrimental to tunnel construction, prediction of the karst development and distribution as well as filling properties within the tunnel location and surrounding zones is necessary and urgent. Using the successful case of the No.2 West Lake tunnel on the Naxi- Guizhou Expressway as an example, the adopted comprehensive geological forecasting techniques, which mainly consisted of the geological survey method, pre-probing method through the pilot drift, and electromagnetic wave reflection method, are introduced and analyzed in detail. The results show that the comprehensive geological forecasting techniques play an effective role and provide a scientific basis for observational construction.