土石坝低弹性模量混凝土防渗墙应力变形数值分析  

Numerical Analysis on Stress and Deformation of the Earth-rock Dam Cutoff Wall Using Low Elastic Modulus Concrete

作　　者：马晓华[1,2] 梁国钱[1] 郑敏生[1] 徐长节[2] 牟儒[2] 

机构地区：[1]浙江省水利河口研究院浙江省水利防灾减灾重点实验室,浙江杭州310020 [2]浙江大学软土与环境工程教育部重点实验室,浙江杭州310027

出　　处：《水力发电》2011年第4期51-54,共4页Water Power

基　　金：浙江省重大科技专项资助项目(2008C13040-2);浙江省水利科技计划资助项目(RA0901)

摘　　要：目前关于在大坝除险加固过程中应用较多的低弹性模量混凝土防渗墙的工作性状及受力特性等方面的研究较少,有必要进行深入研究。对采用低弹性模量混凝土防渗墙加固的某土石坝典型断面进行了有限元数值分析,采用改进的Goodman单元模拟防渗墙与周围土体的接触面,计算了不同水位下防渗墙的应力变形情况,并将数值计算得到的水平位移值与实测值进行了对比。此外,还对比分析了不同弹性模量下防渗墙墙体的位移和应力变化情况,可供实际加固工程中防渗墙弹性模量取值时参考。The operating and mechanical performances of cutoff wall using low elastic modulus concrete need to be studied in detail as more and more application in dam reinforcement. The stresses and deformations of low elastie modulus concrete cutoff wall under different water level were analyzed by FEM herein for the reinforcement of an earth-rock dam. The modified Goodman elements were adopted to sinmlate the contact between the cutoff wall and dam, and the calculated horizontal displacements were compared with the actual measurements. The stresses and deformations of cutoff wall with different elastic modulus concretes were also calculated. This study can provide reference to the selection of elastic modulus for the cutoff wall of reinforefng dam.

关 键 词：土石坝 修正Goodman单元 低弹性模量 防渗墙 

分 类 号：TV543[水利工程—水利水电工程]