大瑞铁路大柱山隧道高压富水断层处理技术

摘要

大理—瑞丽铁路大保段大柱山隧道地质构造复杂,断层密集,岩性繁多,软弱破碎,岩溶发育,高压富水,地下水压力最高达3 MPa.在平导施工穿越燕子窝断层时发生了严重的突泥涌水事件.针对富水高压断层处理问题,文章开展了注浆加固堵水技术研究,在反复试验的基础上探索总结出了高压动水分段引排、超高压聚合注浆施工技术,并详细阐述了注浆加固技术方案、施工设备配置、关键工艺参数以及施工组织管理要点等,对类似工程具有良好的借鉴意义.%The Dazhushan tunnel of Dali-Ruili railway is located in an area with complex geological structures,dense faults,various lithologies,fractured soft rock,developed karst and an underground water pressure of up to 3 MPa.Serious mud bursts and water inflow occured during the construction of the parallel adit passing through the Yanziwo fault.The water-stopping technique of grouting reinforcement is studied in light of this high-pressure fault with abundant water; sectional water drainage for moving water and polymerized grouting with super high pressure are presented; and the key points of the grouting reinforcement scheme,construction equipment configuration,criti-cal technology parameters and construction organization are described in detail.