层状岩层高临空面地下洞室开挖与支护技术探讨  

Discussion on Excavation and Supporting Technologies of Underground Cavern in Layered Rock with High Overhead Surface

作　　者：任海军[1] 张明高 

机构地区：[1]长江科学院,湖北武汉430010 [2]重庆巨能建设(集团)有限公司,重庆401120

出　　处：《水力发电》2016年第9期72-74,共3页Water Power

摘　　要：结合阿尔塔什水利枢纽2号深孔排沙放空洞龙抬头直线段开挖工程实例,对层状岩层高临空面地下洞室开挖与支护技术进行探讨。实践证明,高临空面地下洞室开挖中应重点考虑施工台车的整体刚度和稳定性,通过根据围岩的揭露情况及时调整施工方案,不仅有利于围岩的稳定性,而且可以加快施工进度,节约工程造价。Taking the excavation of dragon-raise-head straight section of No. 2 deep flushing tunnel in Aertashi Hydro Project as a study case, the excavation and supporting technologies of underground cavern in layered rock with high overhead surface are discussed. The actual practice proves that the overall rigidity and stability of construction trolley should be emphatically considered in the excavation of underground cavern with high overhead surface, and the excavation and supporting scheme should be timely adjusted according to the disclosure of surrounding rock, which is not only conducive to the stability of surrounding rock, but also can accelerate construction progress and save project cost.

关 键 词：层状岩层 高临空面 地下洞室 开挖 支护 阿尔塔什水利枢纽 

分 类 号：TV542[水利工程—水利水电工程]