复杂地质条件下大断面隧洞交叉口快速开挖技术

Analysis of rapid excavation technology of large section tunnel intersection under complicated geological conditions

橙子沟水电站引水隧洞和2号支洞交叉口围岩复杂、开挖空间大,为此采取超前锚固、分区开挖、加强支护、跟踪监测的方法,安全、快速的完成了开挖施工,为隧洞施工创造了作业面,该方法安全性好、施工速度快,施工难度小,可作为同类工程的参考。

Chengzigou power station diversion tunnel 2# and tunnel surrounding rock complex,the intersection of excavation space,to advance anchorage excavation,strengthening support,partition and tracking monitoring method,safety,rapid completion of the excavation construction,creating a work surface for tunnel construction,the safety and speed of construction,the construction difficulty is small,can be used as reference for similar projects.