山岭隧道涌水量探讨——以西南某岩溶隧道为例

Discussion the Mountain TunnelWater Surge,Case Study with some Karst Tunnel in Southwest China

本文以西南某岩溶山岭隧道为研究对象,采用地下水径流模数法、地下水动力学法和降水入渗法分别预测隧道各延段、各时期的涌水量变化。研究结果表明:拟建隧道涌水量在4897m^(3)/d~7122m^(3)/d区间变化,80%的涌水属于岩溶水;各岩层丰、平水期的涌水量变化趋势基本相同,嘉陵江组一段(T_(1)j^(1))地层的涌水量最大,但是T_(1)j^(1)地层丰水期与平水期的涌水量相差约500m^(3)/d。其余地层中,丰水期与平水期的涌水量相差不超过200m^(3)/d。

some tunnel in southwest China was chosen as the research object,using groundwater runoff modulus method,groundwater dynamics method and precipitation infiltration method to predict the change of tunnel surge water in each extension section and each period respectively.The results show that the proposed tunnel gushing water in 4897m^(3)/d~7122m^(3)/d area,and 80%of the tunnel gushing water belongs to karst water,each rock stratum abundant water period,flat water period of the water gushing trend is basically the same,T_(1)j^(1) stratum of the water gushing to reach a great value,but T_(1)j^(1) stratum abundant water period and flat-water period of the water gushing difference of about 500m^(3)/d.The rest of the stratum,abundant water period and flat-water period of the water gushing difference does not exceed 200m^(3)/d.