对于给定的土质条件,可把相交界面处临界温度和临界湿度作为已知势判定条件,冻结空间的湿度分布状态可作为温度分布的已知函数(或实验曲线)给出,因此土冻融空间冰、水、热的瞬时状态,在边界约束条件和内域各变量互约束及势判定条件的限定之下,存在唯一确定的解. For a given soil condition, the critical temperature and the critical humidity at the interface can be used as a known potential determination condition. The moisture distribution state of the frozen space can be given as a known function (or experimental curve) of the temperature distribution, so the soil freeze-thaw The instantaneous state of space ice, water, and heat, under the constraints of the boundary constraints and the inter-constraint and potential judgment conditions of the variables in the inner domain, there is a uniquely determined solution.