高水头既有防渗体系下深层渗漏处理  

Deep Percolation Treatment under Existing Anti-Seepage System with High Head

作　　者：禹亮华 YU Lianghua(Guangzhou Development Group Incorporated Company, Guangzhou510623 China)

机构地区：[1]广州发展集团股份有限公司,广东广州510623

出　　处：《红水河》2025年第1期19-22,共4页

摘　　要：某大型水利枢纽工程上游围堰采用塑性混凝土防渗墙上接土工膜及两侧黏土防渗结构。水库蓄水期间,基坑渗水量突增至3400 m^(3)/h,需进一步进行防渗处理。根据围堰结构特点及地层特点,通过新增勘探孔、物探、现场检查兼灌浆孔连通试验等手段相结合、相互验证,快速准确地确定渗漏部位,并提出水下灌注砂浆、膏浆(速凝膏浆)、化学浆液、双液等防渗处理方案,对大漏量孔段采用灌注膏浆(速凝膏浆)、化学灌浆、水泥浆水玻璃双液堵漏灌浆等方法进行处理。结果表明,所采用的防渗方案堵漏效果显著。该工程经验可供类似工程参考借鉴。The upstream cofferdam of a large-scale water conservancy project adopts plastic concrete cut-off wall with geomembrane and clay on both sides to prevent seepage.During the impoundment of the reservoir the seepage volume of the foundation pit suddenly increases to 3400 m^(3)/h which needs further anti-seepage treatment.According to the structural characteristics of the cofferdam and the characteristics of the stratum through the combination and mutual verification of new exploration drilling geophysical exploration on-site inspection and grouting hole connectivity test the leakage site is quickly and accurately determined and the anti-seepage treatment schemes such as underwater grouting mortar paste slurry quick-setting paste slurry chemical slurry and double liquid are proposed.The large leakage hole section is treated by grouting paste slurry quick-setting paste slurry chemical grouting cement slurry and water glass double liquid plugging grouting.The results show that the anti-seepage scheme adopted has good plugging effect.The engineering experience can provide reference for similar projects.

关 键 词：高水头 土石围堰 深层渗漏 化学灌浆 防渗处理 

分 类 号：TV543[水利工程—水利水电工程]