无限深透水坝基渗流场与应力场耦合分析  

The coupling analysis of seepage field and stress field on the infinite deep pervious foundation

作　　者：毛海涛[1,2,3] 何华祥[2] 邵东国 王晓菊 

机构地区：[1]重庆三峡学院土木工程学院,重庆万州404100 [2]武汉大学水利水电学院,武汉4300721 [3]重庆三峡水利电力集团股份有限公司,重庆万州404100

出　　处：《水动力学研究与进展（A辑）》2015年第2期223-229,共7页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金资助项目(51309262);重庆市博士后科研项目特别及日常资助(RC201417;XM2014088);重庆三峡学院重点项目(12ZD20)~~

摘　　要：无限深透水坝基的渗流问题是建在此类地基上土石坝成败的关键问题。渗流场和应力场耦合计算更加符合渗流实际情况。该文基于土体孔隙率和渗透性的相互关系,借助有限元软件geostudio/seepage和Sigma/w双场耦合模型,研究符合耦合计算的操作步骤;利用模型对实际工程进行计算,得到了沉降量,孔隙率的变化,主应力、渗透量及渗透坡降等关键参数在耦合时的变化规律。计算结果说明了坝基孔隙率和渗透系数相互作用并趋于稳定的过程,符合实际观测情况。Infinite deep pervious foundation seepage problem is one of the key problems of earth-rock dam on the success or failure. The seepage field and stress field coupling more accords with the actual situation of seepage calculation. Based on the relationship of the soil porosity and permeability, with the aid of the finite element software geostudio/seepage and double field coupling model of seepage Sigma/w, calculation steps in conformity with the coupling are studied. By using model to simulate the actual engineering calculation, the change rules of key parameters, such as settlement, the change of porosity, principal stress, osmotic quantity and seepage slope, are developed when coupling. Calculation results show that the relationship of dam foundation coefficients of permeability and porosity, is a process of interaction and stable, the calculation results accord with actual observations.

关 键 词：无限深透水地基 渗流场 应力场 

分 类 号：TV1[水利工程]