长大浅埋有压引水隧洞防排水施工技术研究  

Study on Waterproof and Drainage Technology of Long Shallow Buried Pressure Headrace Tunnel

作　　者：魏世康 WEI Shikang(China Railway 18th Bureau Group Tunnel Engineering Co.,Ltd.,Chongqing 400700,China)

机构地区：[1]中铁十八局集团隧道工程有限公司,重庆400700

出　　处：《国防交通工程与技术》2023年第3期42-45,62,共5页Traffic Engineering and Technology for National Defence

摘　　要：长大浅埋富水区有压引水隧洞的防渗漏工艺措施非常重要,如果出现渗漏,不仅影响隧洞结构的稳定,还会影响隧洞周边岩体的稳定和引水效果。以某长大浅埋富水区有压引水隧洞作为研究案例,针对较小渗水采用楔形凹槽排水管、线槽预埋管、防水卷材等排水和防水方式;针对大涌水采取超前圆环预加固间隔分段注浆法等防水措施;另外引入伸缩缝表层柔性止水结构,有效解决了隧洞伸缩缝易产生渗水涌水等问题,确保了工程质量和施工安全。The anti-seepage process measures for pressure diversion tunnels in long shallow water rich areas are very important.If leakage occurs,it will not only affect the stability of the tunnel structure,but also affect the stability of the rock mass and the diversion effect of the tunnel.In this paper,the pressure diversion tunnel in a long and shallow water rich area is taken as a research case,the drainage and waterproofing methods such as wedge-shaped groove drainage pipe,line groove embedded pipe and waterproof coiled material are adopted for small seepage.In order to cope with large water inrush,some waterproof measures such as advance ring pre-reinforcement interval subsection grouting are adopted.In addition,the flexible sealing structure on the surface of the expansion joint is introduced,which effectively solves the problems such as water seepage and gushing of the tunnel expansion joint,and ensures the quality of the project and construction safety.

关 键 词：长大浅埋 有压引水隧洞 防排水技术 预加固间隔分段注浆 柔性止水结构 

分 类 号：U453.6[建筑科学—桥梁与隧道工程]