某抽水蓄能电站下水库混凝土重力坝渗流计算及防渗优化分析  

Seepage Calculation and Anti-seepage Optimization Analysis of Concrete Gravity Dam of Lower Reservoir of a Pumped Storage Power Station

作　　者：冯先伟 高东红 田金波 李皓璇 FENG Xian-wei;GAO Dong-hong;TIAN Jin-bo;LI Hao-xuan(Shanghai Investigation,Design&Research Institute Co.,Ltd.,Shanghai 200434,China;Changshu Water Service Center,Suzhou 215505,China)

机构地区：[1]上海勘测设计研究院有限公司,上海200434 [2]常熟市水务服务中心,江苏苏州215505

出　　处：《水电能源科学》2025年第1期108-111,78,共5页Water Resources and Power

基　　金：上海勘测设计研究院有限公司项目基金(2022SD(101)-004(YFA))。

摘　　要：大坝防渗措施不当会增加坝基渗漏量,增大坝体扬压力,对坝体稳定造成不利影响,同时防渗工程投资占比较大,需合理布置工程防渗方案。依托某抽水蓄能电站下水库混凝土重力坝坝址区工程的实际情况,建立了三维有限元模型,分析了防渗设计方案下坝址区渗流场分布性态及各部位渗透坡降和渗透流量等要素,研究了延伸坝肩帷幕长度、加深帷幕底线和帷幕双排布置中的单因素和多因素作用对坝址区渗透流量的影响,并依据分析结果对设计防渗方案进行优化。结果表明,设计防渗方案渗控效果明显,坝址区防渗帷幕渗透坡降和坝基各部位渗透流量均小于允许值;综合工程经济性和防渗控制效果,采用拦河坝和拦沙坝帷幕底线整体加深1/3方案对防渗系统的优化措施最优。Improper anti-seepage measures of the dam will increase the leakage of the dam foundation,increase the uplift pressure of the dam,and adversely affect the stability of the dam body.At the same time,the investment of the anti-seepage project accounts for a large proportion,and the anti-seepage scheme of the project needs to be reasonably ar-ranged.In view of the actual situation of the concrete gravity dam in the lower reservoir of a pumped storage power sta-tion,a three-dimensional finite element model was established.The distribution of seepage field in the dam site area un-der the anti-seepage design scheme and the seepage gradient and seepage flow of each part were analyzed.The influence of single factor and multi-factor on the seepage flow in the dam site area was studied by extending the length of the dam a-butment curtain,deepening the bottom line of the curtain and double-row arrangement of the curtain.According to the a-nalysis results,the design anti-seepage scheme was optimized.The results show that the seepage control effect of the de-signed anti-seepage scheme is obvious,and the seepage gradient of the anti-seepage curtain in the dam site area and the seepage flow of each part of the dam foundation are less than the allowable value.Based on the comprehensive engineering economy and anti-seepage control effect,The scheme of deepening the curtain bottom line of barrage dam and sediment barrage dam by 1/3 is the best method to optimize the anti-seepage system.

关 键 词：混凝土重力坝 三维有限元模型 防渗帷幕 渗透流量 优化分析 

分 类 号：TV223.4[水利工程—水工结构工程]