低水位运行下心墙堆石坝的渗漏与渗流稳定分析  

Leakage and seepage analysis of corerockfill dam under low-water level operation

作　　者：吴春晖 陈晓华 丁玉堂 陆阳洋 熊国文[3] Wu Chunhui;Chen Xiaohua;Ding Yutang;Lu Yangyang;Xiong Guowen(Ninghai County Township Water Conservancy Service Station,Ningbo 315600,China;Ninghai County Water Conservancy Bureau,Ningbo 315600,China;Geotechnical Engineering Department,Nanjing Hydraulic Research Institute,Nanjing 210024,China)

机构地区：[1]宁海县镇乡水利服务总站,浙江宁波315600 [2]宁海县水利局,浙江宁波315600 [3]南京水利科学研究院岩土工程研究所,江苏南京210024

出　　处：《山西建筑》2023年第9期195-198,共4页Shanxi Architecture

基　　金：宁波市水利科技项目(NSK201709);南京水利科学研究院青年基金项目(Y316020)。

摘　　要：某水库坝体为黏土心墙堆石坝,坝体在库水位较低工况下发生了多处渗漏。通过开展现场监测和室内渗透试验,对心墙堆石坝的渗漏原因进行了分析,并进一步建立了坝体三维有限元渗流计算模型,分析了正常蓄水位工况下大坝的渗流稳定。结果表明,由于心墙堆石坝黏土心墙料的渗透系数与坝壳料的渗透系数接近,同时大坝下游排水设施排水效果较差,造成大坝在低水位运行工况下发生了渗漏;正常蓄水位工况下坝体浸润线过高,有可能导致下游坝坡渗透破坏、坝体渗漏过大的问题。因此,建议工程对坝体下游反滤排水设施进行改造或增设防渗墙。A clay core rockfill dam experienced many leakages when the reservoir water level was low.In this paper,on-site monitoring and seepage tests were conducted to analyze the leakage causes of the dam,and a three-dimensional finite element seepage calculation model of the dam was established to study the stable seepage under normal storage level.The results show that the permeability coefficient of the clay core material is close to that of the dam shell material,and the drainage effect of the downstream drainage facilities of the dam is poor,resulting in the leakage of the dam under the operating condition of low-water level.In the case of normal storage level,the wetting line of the dam body is high,which may lead to seepage damage of the downstream dam slope and the problem of excessive leakage of the dam body.Therefore,it is recommended to transform the downstream anti-filtration drainage facilities or add a seepage-proof wall to the dam body to reduce the dam body infiltration line.The research results can provide a basis for the similar project concerned.

关 键 词：心墙堆石坝 低水位 渗漏 渗流稳定 有限元 

分 类 号：TU289[建筑科学—建筑设计及理论]