考虑渗透动水压力时等效连续岩体渗流场与应力场耦合分析的数学模型  

Mathematical Model for Coupled Seepage and Stress Fields in Rock Mass of Equivalent Continuum by Considering Hydrodynamic Seepage Pressure

作　　者：柴军瑞[1] 

机构地区：[1]四川大学水电学院,四川成都610065

出　　处：《四川大学学报（工程科学版）》2001年第6期14-17,共4页Journal of Sichuan University (Engineering Science Edition)

基　　金：中国博士后科学基金项目资助 (2 0 0 1年 ) ;陕西省自然科学研究计划项目资助 (99C2 2 )

摘　　要：渗流对等效连续岩体的作用力包括渗透静水压力和渗透动水压力 (渗流体积力 )两部分。文中较全面地引入渗流与应力之间的相互作用关系 ,同时考虑渗透静水压力和渗流体积力的作用 ,以渗透系数与空隙率、体积应变的关系为桥梁 ,建立等效连续岩体渗流场与应力场耦合分析的数学模型 ,并采用有限元数值方法结合算例进行双场耦合分析与计算。结果表明 ,计入耦合作用 ,岩体各应力分量有不同程度的增大。The action forces applied on rock mass of equivalent continuum by seepage include two parts, i.e., hydrostatic seepage pressure and hydrodynamic seepage pressure (seepage body force). The whole interaction between seepage and stress is introduced. With the hydrostatic seepage pressure and seepage body force being simultaneously considered, the mathematical model for coupled seepage and stress fields in rock mass of equivalent continuum is established with the linkage of hydraulic conductivity and porosity (or volumetric strain). An example is computed by FEM numerical method to show that the coupled action makes the stress components in rock mass increase by different degree.

关 键 词：等效连续岩体 渗透动水压力 体积应变 渗流场 应力场 耦合分析 渗透系数 数学模型 岩体力学 

分 类 号：TV139.14[水利工程—水力学及河流动力学]