山岭隧道高压富水断层处理方案探讨

Studyon Schemesfor High Pressureand Rich Water Shattered Falut Zone of Mountain Tunnel Treatment

长大山岭隧道不可避免地要通过断层破碎带等不良地质,在隧道施工过程中,尤其是在断层带地下水发育、导水性良好、补给充分的情况下,极其容易发生突水突泥等地质灾害,严重影响施工及运营安全。本文对龙南隧道F8高压富水断层破碎带工程情况进行了综合分析,简要论述了穿越该断层所采用的超前支护措施、加强型排水衬砌、地表降水等综合工程措施,可有效控制隧道施工突泥涌水,技术经济效益高,可达到预期效果,可为今后此类隧道的设计与施工提供参考。

Unavoidably, long mountain tunnel construction may go through unfavorable geology, like shattered fault zone. Geologic disaster likegushing waterwill likely to happen if the fault zone has well developed under water, good hydraulic conductivity and sufficient supply. This may seriously affect construction safety.This paper has conducted a comprehensive analysis on the engineering feature of Long Nan tunnel F8 high pressure rich water shattered fault zone, it detaileddiscusses comprehensive construction measures, like advanced geological prediction,full face advanced pre-grouting,advanced big pipe roof, strengthened lining andsurface precipitation, etc. Those measures can efficiently controlle the gushing water caused by tunnel construction and achieve its designed effect. What has been gained in this paper will provide the reference for the design and construction of similar tunnels.