水库坝基防渗帷幕深度设置问题探讨  

Discussion on the Setting of Water-stop Curtain Depth of Reservoir Dam Foundation

作　　者：陈浩 CHEN Hao(Sinan County Water Bureau,Sinan 565100,China)

机构地区：[1]思南县水务局,贵州川思南565100

出　　处：《河南水利与南水北调》2024年第2期85-86,共2页Henan Water Resources & South-to-North Water Diversion

摘　　要：坝基岩体渗流对大型混凝土重力坝的建设和安全运营有重要影响。文章以大型混凝土重力坝为例,基于MIDAS/GTS建立三维渗流计算模型,对比分析四种工况下坝基岩体的总水头的变化。结果表明:对比止水帷幕设置长度为0 m和5 m,长度为5m时对止水帷幕下游建基面的总水头影响不明显;止水帷幕设置长度为15 m和20 m有效降低了止水帷幕下游建基面的总水头。结合工程设计要求及经济效益,确定了15 m深止水帷幕是较合理的方案。研究结果为水利工程防渗提供参考。The seepage of rock mass in dam foundation has an important influence on the construction and safe operation of large concrete gravity dams.Taking a large concrete gravity dam as an example,a 3D seepage calculation model based on Midas/GTS is established to compare and analyze the changes of total water head of dam foundation rock mass under four working conditions in this paper.The results show the following two points.Firstly,when the length of the curtain is 0m and 5m,the effect on the total water head of the base surface downstream of the water-stop curtain is not obvious.Secondly,when the length of the curtain is 15 m and 20 m,the total water head of the foundation surface downstream of the curtain is effectively reduced.Combined with the engineering design requirements and economic benefits,it is determined that the 15m deep water-stop curtain is determined to be a reasonable scheme.The study results provide reference for hydraulic engineering seepage control.

关 键 词：数值模拟 坝基岩体 渗流分析 止水帷幕 

分 类 号：TV543[水利工程—水利水电工程]