特长引水隧洞全断面开挖施工技术  

Construction Technology of Full-Section Excavation of Extra-Long Diversion Tunnel

作　　者：赵杨 ZHAO Yang(Jiangxi Water Conservancy and Hydropower Construction Group CO LTD.,Nanchang 330200,China)

机构地区：[1]江西省水利水电建设集团有限公司,江西南昌330200

出　　处：《河南水利与南水北调》2023年第4期50-52,共3页Henan Water Resources & South-to-North Water Diversion

摘　　要：引水隧洞不仅长,而且断面比较狭小,地质环境非常复杂,增加了引水隧洞开挖施工难度。为分析特长引水隧洞全断面开挖施工技术,以云南丽江金沙江龙蟠提水工程为例,结合工程实际情况,从支洞选择、爆破、通风、出渣、开挖等环节进行优化,制定了一套具有针对性的全断面开挖施工方法,结果显示,经采用以上施工,隧道工程在工期期限前完成施工,验收质量合格,施工期间未发生安全事故,成功解决了单个工作面施工距离长、施工断面小、出渣难、通风难等问题,取得了理想的施工效果。In water conservancy infrastructure,the diversion tunnel is not only long,but also has a narrow cross-section,and the geological environment is very complex,which increases the difficulty of excavation and construction of the diversion tunnel.To analyze the full-section excavation construction technology of long water diversion tunnels,taking the Longpan Pumping Project of the Jinsha River in Lijiang,Yunnan as an example,and combining with the actual situation of the project,optimization was carried out in the aspects of branch selection,blasting,ventilation,slag removal,and excavation,etc.A targeted full-section excavation construction method was developed.The results showed that by adopting the above construction methods,the tunnel project was completed before the deadline,passed the acceptance quality,and no safety accidents occurred during the construction period.The problems of long construction distance,small construction section,difficult slag discharge and difficult ventilation of a single working face were successfully solved,the ideal construction results have been obtained.

关 键 词：引水隧洞 小断面 长隧道 全断面开挖 

分 类 号：TV554.1[水利工程—水利水电工程]