河谷地形对心墙堆石坝应力变形影响分析  

Effect Analysis of Valley Topography on Stress Deformation of Core Rockfill Dam

作　　者：褚福永 

机构地区：[1]丽水学院工程与设计学院,浙江丽水323000

出　　处：《山西科技》2017年第6期119-122,126,共5页Shanxi Science and Technology

基　　金：水利部堤防安全与病害防治工程技术研究中心开放课题"粗粒土颗粒破碎与剪胀演化规律及其临界状态研究";丽水市高层人才项目"复杂应力条件下粗粒土力学特性及其本构模型研究"(编号:2015RC167)

摘　　要：针对某V型河谷上的心墙堆石坝,采用邓肯-张E-v模型描述堆石料,Goodman单元模型描述土与结构体的接触面,三维有限元方法对比分析不同河谷宽高比时竣工期心墙堆石坝的应力和变形。结果表明:河谷地形对心墙堆石坝应力变形影响显著,河谷宽高比越小,竣工期坝体沉降、顺河向水平位移、纵断面坝轴向水平位移都越小;河谷宽高比越大,竣工期坝基覆盖层的沉降越大,防渗墙的应力也越大。Aiming at the core rockfill dam in V river valley,this paper describes rockfill materials using Duncan-Chang E-v model,describe the contact surface between soil and structure using Goodman unit model,compares and analyzes the stress and deformation of core rockfill dam with different aspect ratio of river valley during completion period using three dimensional finite element method. The results show that the influence of valley topography on stress and deformation of core rockfill dam is significant,the aspect ratio of river valley is smaller,the settlement of dam body during completion period,the horizontal shift along river flow direction,the horizontal shift of axial direction of longitudinal section dam are smaller;the aspect ratio of river valley is greater,the settlement of the dam foundation overburden during the completion period is greater,and the greater the stress on the cutoff wall is greater.

关 键 词：河谷形状 心墙堆石坝 应力变形 有限元 

分 类 号：TV641.4[水利工程—水利水电工程]