三板溪尾水支洞岔管段爆破开挖与围岩稳定研究  

Study on blasting excavation and rock stability of manifold section of tailrace tunnel of Sanbanxi Hydroelectric Project

作　　者：段征宇[1] 李坚[1] 钟平 

机构地区：[1]中南勘测设计研究院,湖南长沙410014 [2]湖南五凌水电开发有限公司,湖南长沙410014

出　　处：《水力发电》2004年第6期34-36,77,共4页Water Power

摘　　要：三板溪水电站地下厂房4条尾水支洞在岔洞附近与调压井为大型洞室空间立体交叉,彼此与相邻洞室又形成超薄岩柱,洞室成型与围岩稳定问题突出。为确保施工质量和安全,根据现场施工条件和特点,做了一些探索和实践,薄柱成型和围岩稳定达到了预期目标。A large-scale underground chamber complex forms close to the manifold sections in Sanbanxi hydroelectric project where the four tailrace tunnel branches connects to the two manifolds and the surge shafts. Super-thin rock pillarswalls created between the neighboring tunnels. The problems about chamber forming and rock stability become outstan-ding. In order to ensure the construction quality and safety, some researches and practices are carried out according to the site construction conditions and characteristics. Expected objectives in super-thin pillarwall formation and rock stability have been realized.

关 键 词：爆破振动 围岩稳定性 锚喷支护 三板溪水电站 

分 类 号：TV542.4[水利工程—水利水电工程]