长距离小断面引水隧洞涌水及渗水处理方案探讨

大山哨隧洞全长8641 m，最大开挖断面仅为4.4 m×5.243 m，整条隧洞均位于地下水位以下，岩溶和裂隙较发育。针对该隧洞轴线长、断面小特点，以及在开挖中出现多处涌水和多段渗水情况，通过采取一系列系统的工程处理措施，有效解决涌水和渗水对施工开挖和混凝土衬砌质量的影响，为同类工程施工积累了丰富的经验。

Long Distance and Small Section of Diversion Tunnel in Gushing and Seepage Treatment Discusion

DaShanShao tunnel length is 8 641m in length, and the maximum excavation section is 4.2 m ＆#215;4.943 m.The whole tunnel is located below the water table , and karst and fissure is developing .Aiming to long axis , and small section of the tunnel , and the emergence of a number of water gushing and multi section water seepage in excavation , a series of systems engineering treat-ment measures have been taken , which effectively solves the influences of gushing water and seepage of excavation on construction of lining concrete quality , as well as provides rich experience for similar project construction.