某特长公路隧道F_2断层处突水涌泥综合处理方法

Comprehensive Treatment Method of Gushing Water and Gushing Mud at F_2 Fault in Over-length Highway Tunnel

在建的某隧道为岩溶发育的特长公路隧道,存在断层、破碎带等,地质情况复杂多变。在施工过程中发生了突水、涌泥灾害,造成了严重坍塌事故,导致施工受阻。通过对隧道突水、涌泥及坍塌地质灾害产生的原因进行详细的分析研究,最后采用了多点集中排放,降、排、防相结合的措施,高压劈裂注浆并结合负压排水,三台阶施工方法施工,对F2断层坍塌处进行了加固,达到了预期的效果,对同类工程具有一定的参考和借鉴意义。

A tunnel in construction is a special long highway tunnel with karsts, faults and fracture zone, the geological condition of it is very complicated. Water inrush and gushing mud disaster had happened during the construction progress, caused serious landslide accident and the construction hindered. Through analyzing and researching the reason of the disasters in detail, concentrated drainage comhined with dewatering, drainage and waterproof, high pressure fracturing grouting combined with under pressure drainage 3-step construction method treatment were adopted, the consolidation and reinforcement were clone to the F2 fault and the landslide part, achieved the desired results, this paper has certain reference significance for similar engineering projects.