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将冻土与扩大墙基作为一个整体结构，将各向弹性模量及泊松比随温度、水分、应力变化的冻土视为正交各向异性的非线性材料；将冻土冻胀系数作为负线膨胀系数，按结构温度应力的计算方法，应用结构非线性分析的有限元法，对冻土与扩大墙基之间的相互作用进行数值计算，获得其应力场、位移场及冻土与扩大墙基之间的各种作用力；理论分析结果与模型试验吻合，提出了一种求解冻土与基础相互作用的通用数值分析方法，供生产设计参考应用。
Considering the permafrost and the expanding wall base as a whole structure, the permafrost modulus and Poisson’s ratio with temperature, moisture, and stress change in the permafrost are considered as orthotropic nonlinear materials; the permafrost frost heaving coefficient As a negative coefficient of linear expansion, according to the calculation method of structural temperature stress, the finite element method of structural nonlinear analysis is used to calculate the interaction between permafrost and the enlarged wall base, and its stress field, displacement field and frozen soil are obtained. Various forces between the wall base and the expansion; the theoretical analysis results are consistent with the model test, and a general numerical analysis method for solving the interaction between the frozen soil and the foundation is proposed for the reference of the production design.