土石坝低弹模塑性混凝土防渗墙应力变形分析  

Analysis of Stress Deformation in Low Elasticity Module Plasticity Concrete Cutoff Wall of Earth and Rock Dam

作　　者：杨洋 黄德强[2] 

机构地区：[1]重庆市弘禹水利咨询有限公司,重庆400074 [2]中国水电顾问集团华东勘测设计研究院,杭州310014

出　　处：《中国水能及电气化》2014年第9期52-56,共5页China Water Power & Electrification

基　　金：福建省自然科学基金资助项目(2011J01309)

摘　　要：本文结合福建南安坂头水库大坝防渗墙工程实例,针对低弹模塑性混凝土的特点,对修筑塑性混凝土防渗墙前后的坝体进行了渗流分析,并采用非线性邓肯—张(E—B)模型研究了大坝防渗墙在一定水位下的应力变形特性。结果表明:低弹塑性混凝土防渗墙具有良好的防渗性能;修建墙体后坝体蓄水期垂直位移分布规律与竣工期相似,水平位移有向下游的趋势,坝体蓄水期大小主应力等值线趋势基本与竣工期相似;低弹塑性混凝土防渗墙墙体拉应力随混凝土弹性模量的增大而增大,最大拉应力均位于259.00m高程左右。Combining the project of dam cutoff wall in Fujian Nanan Bantou Reservoir,aiming at the characteristics of low elasticity module plasticity concrete,this paper makes seepage analysis to the dam in the front and back of plasticity concrete cutoff wall,and studies stress deformation characteristics of dam cutoff wall in certain water level with non-linear E-B model.The result shows that low elasticity plasticity concrete cutoff wall has good cutoff performance;vertical displacement distribution laws during sluice period after building the wall are similar as the the completion period,and horizontal displacement has the trend of going towards lower reachs,big and small stress isoline trend of the dam during sluice period is basically similar as the completion period;stretch stress of low elasticity plasticity concrete cutoff wall is increasing with the increase of concrete plasticity module,with maximum stress in the elevation of about 259.00m.

关 键 词：土石坝 低弹模 塑性混凝土 防渗墙 非线性有限元分析 

分 类 号：TV543.8[水利工程—水利水电工程]