碾盘山水利水电枢纽二期围堰防渗体系构建技术研究  

Construction technology of the anti-seepage system for the cofferdam inthe second phase of the Nianpanshan Water Conservancy and Hydropower Hub

作　　者：马辉文[1] MA Huiwen(Sinohydro Foundation Engineering Co.,Ltd.,Tianjin 301700,China)

机构地区：[1]中国水电基础局有限公司,天津301700

出　　处：《水利建设与管理》2024年第10期1-7,共7页Water Conservancy Construction and Management

摘　　要：为创造坝体干地施工条件及评价围堰防渗体系效果,本文以碾盘山水利水电枢纽二期工程左岸连接土坝为例,对新旧防渗墙接头处理进行优化设计,采用3种钻孔法对高喷墙的渗透系数进行试验检查与成果分析,通过水位观测及安全监测资料分析评价防渗体系整体防渗效果。实践表明本工程土石围堰防渗体系的防渗效果达到预期,可为其他类似工程提供借鉴与参考。Taking the left bank connecting earth dam of the second phase project of Nianpanshan Water Conservancy and Hydropower Hub as an example,in order to create dry land construction conditions for the dam body and evaluate the effectiveness of the cofferdam anti-seepage system,this paper optimizes the design of new and old anti-seepage wall joints,uses three drilling methods to test and analyze the permeability coefficient of the high-pressure spray wall,and evaluates the overall anti-seepage effect of the anti-seepage system through water level observation and safety monitoring data analysis.Practice has shown that the anti-seepage effect of the anti-seepage system of earth rock cofferdam in this project has reached the expected level,which can provide reference for other similar projects.

关 键 词：堰坝结合 围堰防渗 防渗墙 高喷 

分 类 号：TV543.8[水利工程—水利水电工程]