某岩溶特长隧道水文地质条件分析及涌水量预测

Hydrogeological Condition Analysis and Water Inflow Prediction of Karst Extra-long Tunnel

以广东省某岩溶区高速公路特长隧道为例,通过野外调查、钻探、抽水试验、连通试验、物探、水质分析等手段,查明隧址区岩溶发育特征与规律,分析隧址区地表水与地下水发育特征以及补给径流排泄关系。分别利用大气降水入渗法与2种地下水动力学法对隧道开挖涌水量进行了计算与预测,并提出工程措施建议。

Taking an extra-long highway tunnel in a karst area in Guangdong Province as an example,through field investigation,drilling,pumping test,connection test,geophysical prospecting,water quality analysis and other means,the characteristics and laws of karst development in the tunnel site are ascertained,and the development characteristics of surface water and groundwater and the relationship between recharge,runoff and discharge in the tunnel site are analyzed.The atmospheric precipitation infiltration method and the two groundwater dynamics methods are used to calculate and predict water influx of tunnel excavation,and engineering measures are proposed.