土石坝混凝土防渗墙的非线性分析  

The nonlinear analysis of diaphragm wall in earth dam

作　　者：杨令强[1] 武甲庆[2] 秦冰 

机构地区：[1]济南大学土木建筑学院,济南250022 [2]山东省水利厅,济南250013 [3]山东水利设计院,济南250013

出　　处：《岩土力学》2007年第S1期277-280,共4页Rock and Soil Mechanics

基　　金：济南大学博士基金(No.B0533)。

摘　　要：采用Duncan-Chang E-B模型描述土的非线性特性,接触单元模拟防渗墙和土石坝之间的相互作用,利用非线性有限元程序计算了土石坝和防渗墙的应力和变形。结果表明:坝体应力状态和变形性质主要取决于坝体断面设计形式,防渗墙在一定范围内起作用;防渗墙材料不同对坝体应力与变形的影响主要由材料的刚度决定,刚性防渗墙对垂直沉降的制约作用明显;柔性防渗墙适应变形的能力强,但对位移的影响较大。对坝体稳定,刚性防渗墙的垂直变形是主要控制因素,关键部位在墙的底部;柔性防渗墙的水平位移是主要控制因素,关键部位在坝体的中下部。Contact element is used to simulate the nonlinear behavior of interaction of diaphragm wall and base. Duncan-Chang E-B criterion is used as constitutions relation of base and dam to represent nonlinear and inelastic characteristics. FEM is used to calculate the stress and deform ation of dam,base and diaphragm wall. The result shows that the stress and strain of dam depend on the selection of dam. The characteristic of diaphragm wall also affects the stress and strain of dam in some regions. The stiffness of diaphragm wall is a key factor in the stress and strain in dam and diaphragm wall. If the stiffness of wall is large,the vertical displace is affected obviously. And the danger location is at the bottom of the diaphragm wall. Besides,the ability of adapting to deformation is high. But the displacement is large. The danger location is at the bottom of dam.

关 键 词：土石坝 防渗墙 应力 应变 

分 类 号：TV642[水利工程—水利水电工程]