【摘要】 冻土在冻结、融化的过程中,未冻区和正冻区发生的物理过程均涉及温度场、水分场、应力场三场的耦合作用问题.尤其在土体的冻胀变形和分凝冰的形成过程中,冻胀应力对冻土地区结构物具有不容忽视的影响.为此,提出了“三场”耦合分析的一般数学格式,采用有限元思想导出相应的时空离散化方程,并给出了非线性数值求解的迭代计算步骤.另外,还给出具体的数值算例,以验证方法的可靠性、有效性和计算精度.更多还原

【Abstract】 The correlation between temperature,moisture and stress must be concerned in frozen soil no matter it is in the process of melting or freezing.Especially in the processes of frost heave and forma-tion of ice,the function of stress is greatly important.In this paper,an analysis model is given con-cerning moisture,temperature and stress simultaneously.By the use of finite element method,the de-tailed deduction of the computational equations is given as well the iterative calculation process.In ad-dition,an example is presented to testify the validity and precision of the model.更多还原