This paper describes the development of a random finite element model that allows holistic simulation of the phase transition and consequent development of internal stress and volume changes in frozen soils. The simulation capabilities of the model are first validated with laboratory scale experiments. The validated model is then implemented to study the soil lateral stress on the retaining wall subjected to frost action. The results show that the frost action leads to an increase of lateral stresses along the retaining wall. Strategies to mitigate the frost loads on the retaining wall are analyzed with this model; drainage of water in the backfill and use of thermal insulation layer both help to mitigate the lateral frost loads. Overall, by accounting for the spatial nonhomogeneity and coupled thermo-mechanical responses in frozen soils, the model provides holistic simulation of the responses of retaining walls subjected to freezing conditions.

本文介绍了一个随机有限元模型的开发，该模型允许对相变进行整体模拟，并进而开发冻土中的内部应力和体积变化。首先通过实验室规模的实验验证模型的仿真能力。然后，将使用经过验证的模型来研究遭受霜冻作用的挡土墙上的土壤侧向应力。结果表明，霜冻作用导致沿挡土墙的侧向应力增加。该模型分析了减轻挡土墙上霜冻负荷的策略。回填中的水排出和使用隔热层均有助于减轻横向霜冻负荷。总体而言，考虑到冰冻土壤中的空间非均质性和热机械响应，