摘要
隧洞交叉口段(岔口段)的施工跨度大、结构复杂,存在安全风险,无自稳性的Ⅴ类围岩交叉口段更是安全施工的重点。本文根据四川木里河上通坝水电站引水隧洞3号施工支洞与引水主洞交叉口段的成功施工经验,分析、总结了该类工程的施工方法,保证了在Ⅴ类围岩中安全完成交叉口的施工任务。
Tunnel crossing section （fork section ） is characterized by large construction span, complex structure and security risk. Class V surrounding rock crossing section without self-stability is critical for safe construction. Construction method of the projects is analyzed and summarized according to successful construction experience of Sichuan Mull River Shangtongba Hydropower Station Water Diversion Tunnel No. 3 Construction Branch Cave and Water Diversion Main Cave Crossing Section in the paper, thereby ensuring safe completion of construction task of crossing in class V surrounding rock.
出处
《水利建设与管理》
2014年第8期12-15,共4页
Water Conservancy Construction and Management
关键词
无自稳性
Ⅴ类围岩
交叉口
施工方法
self-stability
class V surrounding rock
crossing
construction method
