溪洛渡大型地下厂房关键部位开挖围岩稳控技术

摘要

在大型地下厂房洞室群开挖过程中，主体大型洞室关键部位开挖及局部稳定控制工艺是关乎工程顺利进行的重点。以溪洛渡水电站为例，重点介绍了大型地下厂房关键部位开挖体型的设计、开挖顺序的研究及局部稳定控制工艺。工程实践表明，从设计至施工各阶段所采取的措施使地下厂房开挖过程顺利，围岩变形较小；所采取的开挖设计方案及施工工艺适当、可靠，可供同类工程参考借鉴。%In large underground powerhouse cavern excavation , the excavation and stability control technology for the key parts of underground powerhouse is the key to the smooth construction .Taking Xiluodu Hydropower Station as the case , the excavation shape design , excavation sequence and stability control technique for key parts of large underground powerhouse were introduced . The engineering practices show that the smooth excavation of underground powerhouse relies on the measures taken in various sta -ges from design to construction , which makes the deformation of surrounding rock small .The design and construction technique can provide reference for the excavation of similar projects .