论喷锚构筑法在软弱围岩隧道施工中的应用

研究目的:通过对开挖方法、初期支护、监控量测、二次衬砌等关键技术的探讨和分析,为今后类似工程施工总结经验。研究结论:软弱围岩隧道可用分步开挖方法,及早初期支护,及早封闭成环,改善围岩受力结构;加强设计与施工的配合协调,在隧道施工过程中进行位移监控量测,掌握位移变化规律,动态调整设计参数,调整二衬等施工工序施作时间,必要时仰拱、二衬紧跟,保证隧道施工安全。

Application of Shotcrete and Anchorage Support in Construction of Tunnel with Soft- weak Surrounding Rock

Research purposes: The key technologies related to the excavation method,preliminary bracing,monitoring and secondary lining are discussed and analyzed for providing the reference to the similar works. Research conclusions: To the tunnel with soft-weak surrounding rock,the step excavation method should be adopted,the preliminary bracing should be conducted as early as possible and the closure to form a loop should be done as early as possible to improve the loading structure of the surrounding rock.The coor...