黔张常铁路某隧道工程水文地质勘察分析及涌水量预测

Analysis of Hydrogeological Investigation on a Tunnel Engineering for Qianjiang-Zhangjiajie-Changde Railway and the Estimation of Water Inflow

某隧道为新建黔张常铁路的控制性工程。根据隧道的水文地质勘察资料,分析评价了地质构造、地下水的发育及分布规律等水文地质特征,并采用了径流模数法和大气降水入渗法对隧道的涌水量进行预测,经计算,隧道正常涌水量和最大涌水量分别为16 396 m3/d和157 001 m3/d,由此确定了隧道进口段3 680 m为强富水区,出口段2 984 m为弱富水区,进而提出了相应的施工建议。

A tunnel is the dominant engineering for the newly built Qianjiang-Zhangjiajie-Changde Railway. According to the hydrogeological investigation data of the tunnel, the hydrogeological characteristics, such as geological structure, development and distribution law of underground water, were analyzed and evaluated; and by runoff modulus way and atmosphere precipitation infiltration way, the water inflow of tunnel was calculated. It was estimated that the normal and maximum water inflow was 16 396 m^3/d和157 001 m^3/d, respectively; and it was confirmed that the tunnel entrance in 3 680 m was the section of strong rich in water and the tunnel exit in 2 984 m was the section of weak rich in water, furthermore, the corresponding suggestion about the construction was proposed.