强富水隧道下穿河段突涌水灾害综合防控方法研究与应用

Research and application of comprehensive prevention and control method for water inrush in water enriched under-crossing river tunnel

岩溶地区隧道施工过程中,对突涌水灾害源进行准确的超前预报并采取合理的治理措施,是防止隧道突涌水灾害的关键所在。以成兰铁路跃龙门隧道下穿河段为背景,对目前隧道建设过程中含水构造超前预报研究现状进行介绍,总结隧道突涌水灾害源超前预报中存在的主要问题。依托成兰铁路跃龙门隧道下穿河突涌水高风险段落开展隧道激发极化法超前预报,对隧道前方的含水构造进行了三维空间定位,结合靶向钻孔及隧道开挖,有效验证预报结论。综合探测结论及现场实际情况提出隧道下穿河段注浆治理方案并现场实施,保证隧道下穿河段的施工安全。研究结果可为同类工程提供借鉴。

During the process of tunnel construction in karst area,accurate geological prediction and reasonable mitigation measures is the key to prevent water inrush disaster.Based on the research background of Yuelongmen tunnel of Chengdu to Lanzhou railway,the prediction methods for water inrush sources were introduced and the main problems for each method were summarized.The engineering geological and hydrogeological conditions of Yuelongmen tunnel was analyzed,the tunnel induced polarization method was utilized to detect the three-dimensional position,and spatial distribution pattern of rich water area.Combined with target drilling and tunnel excavation,the prediction results were verified effectively.The continuous advanced peripheral grouting method was adopted for the treatment for the rich water area.The research results can be used as reference for similar projects.