摘要
无论交通工程还是输、引水工程，都不可避免的遇到隧洞开挖支护施工。尤其在大埋深、高地应力下，如何保证隧洞安全施工是一个值得探讨的问题，本文结合在锦屏二级水电站引水洞大埋深、高地应力下完整坚硬围岩引起的岩爆和软弱破碎围岩引起的“缩径”现象的处理经验，提出一些措施和看法，供类似工程施工时参考。
No matter it is traffic works or supply and abstraction works, support will be used for all tunnel excavations in the construction. Especially for deeply buried tunnels with high earth stress, how to ensure safety of tunnel construction and make construction products meet the design and specification requirements, it is a question to be worth discussing for construction persons. The paper proposes some measures and views as a reference for similar project construction according to the treatment practice of shrinkage caused by the rock blasting and weakly broken surrounding rock of deeply buried abstraction tunnel with high earth stress of Jinping - 2 Hydropower Project.
关键词
隧洞施工
大埋深
高地应力
岩爆
缩径
tunnel construction
deeply buried
high earth stress
rock blasting
shrinkage
