采用高密度电法进行隧道施工风险预警的方法研究

Study on the Method of Using High Density Electrical Method to Predict Tunnel Construction Risk

针对隧道施工风险,分析了轨道交通工程在黏土地层中采用浅埋暗挖法修建隧道面临的地质风险因素。通过高密度电法监测地层电阻率变化,将其与钻孔试验数据作分析对比,得到电阻率与天然含水率w、土体黏聚力c、内摩擦角φ之间的关系,从而预测前方开挖面临的风险,及时采取有效的措施。提出采用高密度电法监测前方地层中电阻率,通过其与地层参数c,φ之间的正相关关系进行风险预警的方法。

In accordance with the risk of tunnel construction,the geological risk factors of the rail transit engineering in building the tunnel in clay strata by the shallow buried tunneling method were analyzed.Through monitoring the formation resistivity change by the high density electrical method,the correlation between resistivity and natural moisture content w,soil cohesion c and internal friction angle φ can be obtained by analyzing and comparing it with borehole test data so as to predict the front excavation risks, timely take effective measures,put forward the high-density electrical method is used to monitor the front formation resistivity and conduct risk early warning through the positive correlation between it and the formation parameters c and φ.