电站库区对高速公路隧道工程的影响分析

On the Influence of Power Station Reservoir Area on Expressway Tunnel Engineering

水库水会导致库岸隧道水文地质环境改变,影响隧道的建设运营安全。针对狮子坪水电站库区对汶川至马尔康高速公路隧道工程的影响进行分析,根据隧道水文地质条件,采用径流模数法和大气降雨入渗系数法计算各方案线隧道的涌水量,结合运用达西定律计算的水库蓄水对隧道的渗漏水量,比选出最佳的方案线路,可供类似地区高速公路隧道工程参考。

The reservoir impoundment will change the hydrogeological environment of the tunnel along the reservoir bank and affect the safety of tunnel construction and operation.This paper makes an approach to the influence of the Shiziping hydropower station reservoir impoundment on the safety of tunnel construction and operation of the Wenchun-Barkam Expressway.Water yield in the tunnel based on the hydrogeological condition is calculated by the use of runoff modulus method and atmospheric rainfall infiltration coefficient method and the leakage of the tunnel under the condition of reservoir impoundment is calculated by the use of Darcy’s law based on which the best tunnel route scheme is selected.