摘要
根据三峡大坝基岩的具体特点，本文提出了坝基岩体粘弹性应力场与渗流场的耦合分析模型，并对坝基开挖过程进行了模拟计算分析。该模型采用伯格斯模型模拟基岩的粘弹性流变特性，并假设其渗透系数与应力的关系为指数函数关系，考虑了应力场与渗流场的耦合效应。结果表明，渗流场的作用是明显的。
According to the actual situation of the foundation of the Three Gorges dam, a coupled analysis model of viscoelasticity stress field and seepage field was proposed for the bedrock, and the simulating analysis of excavation was carried out. In the analysis the Burgers model is used to simulate the viscoelasticity creep characteristic of bedrock, and the permeability coefficients of the rock masses are assumed to vary as exponent functions of the stress. It is shown that the effect of seepage field is pronounced.
出处
《工程力学》
EI
CSCD
北大核心
2000年第1期105-113,共9页
Engineering Mechanics
关键词
粘弹性
应力场
渗流场
耦合分析
大坝
坝基
viscoelasticity
stress field, seepage field, coupled analysis
