宝兰高铁渭河隧道水文和工程地质选线研究

渭河隧道是宝鸡至兰州高铁重、难点控制性工程。区内地质构造运动较活跃,黄土滑坡、富水砂岩层及饱和卵砾石等不良地质发育,复杂的工程及水文地质条件严重制约着渭河隧道选线工作。通过野外地质调查、原位测试、室内试验、理论计算、地质分析等方法对影响隧道选线的地质问题进行了综合评价,提出竖向绕避滑坡群方案,通过分层抽水试验解决了复杂地层涌水量计算参数的问题,对合理确定隧道埋深和辅助坑道方案的选择具有指导意义。

Research on Hydrogeology and Engineering Geology of Route Selection for Wei He Tunnel on Baoji-Lanzhou High-speed Railway

Weihe Tunnel is a control project of Baoji-Lanzhou high-speed railway. The geological tectonic movements in this area are relatively active. Bad geology, such as loess landslide, water-rich sandstone and saturated gravel, are well developed. Complex engineering and hydro-geological conditions severely restrict the route selection of the Wei He tunnel. By means of field geological investigation, in-situ test, laboratory test, theoretical calculation and geological analysis, a comprehensive evaluation of the geological problems affecting the tunnel route selection is conducted. Finally, a scheme for vertically avoiding landslide groups is proposed. The stratified pumping test has solved the problem of water inflow calculation parameters in complex strata, which has guiding significance for rationally determining tunnel depth and selecting auxiliary tunnel scheme.