摘要
对瀑布沟水电站心墙土石坝进行了三维非线性有限元计算分析,以深入了解高土石坝坝体和基础防渗墙在施工期和蓄水期的应力、变形分布规律。散粒材料均采用邓肯E-ν模型,混凝土采用线弹性模型,接触面采用Goodman单元,并在计算中考虑了上游坝壳、过渡料和反滤料等因水库蓄水而产生的湿化变形。计算结果表明:大坝的应力和变形分布规律基本合理,大坝最大沉降均发生在水库满蓄期,心墙内没有出现拉应力,在心墙、防渗墙、墙顶廊道的接头部位设置的高塑性黏土区改善了大坝的应力状况,使得剪切破坏区大大减小,达到了控制该部位应力与变形的目的。
In order to analyze the stress and deformation distribution regularities of high rockfill dam and foundation diaphragm wall deeply,Pub-ugou high rockfill dam was used as an example of the 3-D nonlinear FEM analysis. Granular materials were adopted Duncan E-v model,concrete by using the linear elastic model,contact interface was adopted the Goodman element model,and the soaking deformation of the upstream shell, transition and the filter materials due to the reservoir filling was also considered in computing. The results show that the dam＆#39;s stress and deformation distribution are basically reasonable,the maximum dam settlement occurs in the reservoir storage period and no tensile stress appears in the core-wall of Pubugou high rockfill dam,the high plastic clay area located in the corewall,diaphragm wall and the joint parts of the wall corridor reduce the shear failure area greatly,which achieves the control purpose of stress and deformation.
出处
《人民黄河》
CAS
北大核心
2014年第5期93-95,共3页
Yellow River
基金
四川省重点科技项目(2011szz004)
关键词
有限元计算
水力劈裂
心墙
拱效应
瀑布沟水电站
finite element calculation
hydraulic fracture
core wall
soil arching effect
Pubugou Hydroelectric Station
