江坪河大坝面板2.5mm PVC防渗膜施工及质量控制  

Construction and Quality Control of 2.5 mm PVC Anti-seepage Membrane for Jiangpinghe Dam Faceplate

作　　者：杨东 Yang Dong

机构地区：[1]中国水利水电第四工程局有限公司,成都610091

出　　处：《建筑技术开发》2021年第1期133-135,共3页Building Technology Development

摘　　要：江坪河水电站大坝是世界第三高混凝土面板堆石坝。考虑到坝体高度较大,水库蓄水后深水位压强对大坝防渗面板的作用力也较大,为确保面板有效防渗,经设计研究论证后决定,在面板表面增设2.5mm PVC防渗膜防渗加强系统。施工过程中根据生产性试验结果并结合现场实际情况制定了施工工艺及质量控制要点。从下闸蓄水后观测结果分析,水位线以下面板防渗的效果良好,达到了预期的目的,实践证明PVC防渗膜起到了良好的防渗作用,可以为类似工程提供借鉴。The dam of Jiangpinghe hydropower station is the third tallest concrete face rockfill dam in the world.Taking into account the large height of the dam body,the pressure of the deep water level after the reservoir is impounded has a greater force on the dam anti-seepage slab.To ensure the effective anti-seepage of the slab,it was decided after design research and demonstration to add a 2.5 mm PVC anti-seepage film on the surface of the slab Anti-seepage strengthening system.During the construction process,the construction technology and quality control points were formulated according to the results of the production test and the actual situation on the site.Analysis of the observation results after the water storage of the lower gate shows that the anti-seepage effect of the panel below the water level is good and achieves the expected purpose.Practice has proved that the PVC anti-seepage film has a good antiseepage effect and can provide a reference for similar projects.

关 键 词：钢筋混凝土面板堆石坝 PVC防渗膜 施工工艺 质量控制 

分 类 号：TU761.11[建筑科学—建筑技术科学] TV543[水利工程—水利水电工程]