固增水电站有压引水隧洞支洞封堵防渗施工技术  

Construction Technology of Sealing and Anti-seepage for the Adits of the Pressuried Headrace Tunnel

作　　者：王军红 WANG Junhong(Sinohydro Bureau 7 Co.,Ltd.,Chengdu Sichuan 610213)

机构地区：[1]中国水利水电第七工程局有限公司,四川成都610213

出　　处：《四川水力发电》2023年第5期9-12,共4页Sichuan Hydropower

摘　　要：固增水电站建设采用EPC总承包模式,其中引水隧洞全长11.06 km,在隧洞出口末端设置调压室。鉴于引水隧道围岩风化破碎严重且地下水丰富,围岩以Ⅳ、Ⅴ类岩体为主,导致施工支洞采用混凝土封堵后渗透性强,对其结构安全及稳定破坏性大。通过研究与分析,最终决定采用有效的防渗施工技术进行处理并达到了设计要求的防渗标准,所取得的经验可为类似工程借鉴。The construction of Guzeng Hydropower Station adopts EPC general contracting mode,of which the total length of the headrace tunnel is 11.06 km,and there is a surge chamber at the end of the outlet.The surrounding rock of the headrace tunnel is mainly composed of Class IV.and V.,in view of that the surrounding rock is severe weathering,broken and abundant with groundwater,resulting in that the adits have strong permeability after being sealed with concrete,which has great damage to the stability of the safety structure.Through technical research and analysis,it was finally decided to adopt effective anti-seepage construction technology and meet the anti-seepage standards required by the design,and the experience gained can provide reference for similar projects.

关 键 词：固增水电站 预固结灌浆 有压引水隧洞 帷幕灌浆 遇水膨胀止水条 橡胶止水 环氧灌浆 防渗施工技术 

分 类 号：TV7[水利工程—水利水电工程] TV52TV554