水库大坝防渗处理方案分析  

Analysis of Anti-seepage Treatment Scheme of Reservoir Dam

作　　者：祝珺 ZHU Jun(Xinyang Nianyushan Reservoir Affairs Center,Shangcheng 465350,China)

机构地区：[1]河南省信阳市鲇鱼山水库事务中心,河南商城465350

出　　处：《河南水利与南水北调》2025年第1期17-18,共2页Henan Water Resources & South-to-North Water Diversion

摘　　要：水库大坝坝基防渗处理采用开挖回填黏土方案,将坝基范围内重粉质壤土、卵石及全风化白云石英片岩挖除,回填防渗土料。结合工程实际,考虑帷幕灌浆施工和反滤砂袋布置,取截水槽宽度13 m。防渗体下部布置帷幕灌浆,帷幕轴线位于坝轴线上游2.40 m,帷幕顶为防渗体底,帷幕顶部布置10 m长,0.60 m厚混凝土盖板作为灌浆平台。文章结合水库大坝坝区地质、地貌、地层,以及渗透系数,对主、副坝坝基防渗处理采用开挖回填黏土方案。通过坝基防渗处理方案比选,详述了垂直防渗措施对水库大坝坝基防渗处理方案。The scheme of excavation and backfill of clay is adopted for seepage control treatment of the dam foundation.The heavy silty loam,pebbles and fully weathered dolomite quartz schist will be removed from the dam foundation and the impermeable soil will be used for backfill.Based on the the specific conditions of the project,the curtain grouting construction and sandbag for reverse filter will be adopted.The width of cutoff trench is 13m.The curtain grouting will be adopted for seepage control of the dam foundation and the curtain axis is located 2.40 m upstream of the dam axis.The top of the curtain is the bottom of the impermeable body.On the top of the curtain is concrete plate of 10m long and 0.60m thick as the grouting platform.Based on the analysis of the geology,geomorphology,strata and permeability coefficient of the reservoir dam area,the scheme of excavation and backfill of clay is adopted for the anti-seepage treatment of the main and auxiliary dam foundations.Through the comparison of dam foundation anti-seepage treatment alternatives,the vertical seepage prevention measures for seepage control of the reservoir dam foundation is described in detail.

关 键 词：坝基 帷幕灌浆 防渗处理 

分 类 号：TV698.2[水利工程—水利水电工程]