洞松水电站引水隧洞软质围岩变形分析及工程对策  

DEFORMATION AND ENGINEERING MEASURES FOR SOFT SURROUNDING ROCK IN THE DIVERSION TUNNEL OF DONGSONG HYDROPOWER STATION

作　　者：李叶[1] 李嘉旭[2] 宇天奇 周道平[1] 

机构地区：[1]四川省水利水电勘测设计研究院,成都610072 [2]四川省交通厅交通设计研究院,成都610071

出　　处：《地质灾害与环境保护》2012年第2期65-70,共6页Journal of Geological Hazards and Environment Preservation

摘　　要：隧洞施工中,软质围岩洞段洞室严重变形,掌子面坍塌。根据该工程特点和开挖洞段技术资料,通过原位测试、试验和监测手段,研究软质围岩变形特征和机理。在此基础上,建议施工遵循短进尺快循环、弱爆破强排水、早封闭强支衬、勤监测速反馈、边开挖边衬砌的施工原则。In the construction, severe deformations and working face collapses occur at the segments with soft rock. The de- formation characteristics and mechanism are studied by testing in situ, testing and monitoring, according to the project charac- teristics and technical materials. Construction principles are proposed as to circulate fast with short drilling depth, drain inten- sively with weak blasting, block earlier with strong support and lining, monitor frequently with quick feedback, and line bricks while excavating.

关 键 词：隧洞施工 软质围岩 变形机理 工程对策 

分 类 号：P642.2[天文地球—工程地质学] TU457[天文地球—地质矿产勘探]