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本文建立了一个冻土水盐热运动的数学模型。为了考虑土壤冻结和化冻时冰一液相变的影响,在传统土壤热传导方程中加入了溶化潜热运动项和在传统土壤水分运动方程中加入了相变项,从而推导出了三个相互关联的冻土水盐热运动方程,并提出了描述冻土未冻水含量随土壤冻结温度而变化的土壤冻结特征曲线及其实验测定方法。这个模型既可适应于冻土,也可适应于未冻土。
This paper establishes a mathematical model of the movement of water and salt in the frozen soil. In order to consider the influence of ice-liquid phase change during soil freezing and thawing, the kinetic term of latent heat of melting was added to the traditional soil heat conduction equation and the phase transition term was added to the traditional equation of soil water movement. Three interdependent The equations of freezing and thawing of soil and water, and the freezing curve of the soils, which describe the variation of the un-frozen water content of frozen soil with the freezing temperature of the soil, and the experimental determination method. This model can be adapted to both frozen and unroasted soil.