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基于相平衡和力平衡提出了一个关于饱和颗粒土的冰分凝模型,引入了冰分凝时未冻水迁移的驱动势,基于Clapeyron方程和吸附膜的观点简要叙述了相变区内未冻水含量与温度及孔隙水压的关系,数值模拟了饱和颗粒土的一维冻结过程,得到了冰分层分凝的计算结果,与已有实验所观测到的现象较为吻合,计算所得的冻胀量的变化趋势与已有实验所测结果是相符的.
Based on the phase equilibrium and the force balance, a model of ice condensate subdivision on saturated granular soil was proposed. The driving potential of unfrozen water during ice subdivision was introduced. Based on the Clapeyron equation and the viewpoint of adsorption membrane, The relationship between water content and temperature and pore water pressure was numerically simulated by one-dimensional freezing process of saturated granular soils. The calculation results of the stratification and freezing of ice were obtained, which were in good agreement with those observed in previous experiments. The trend of the amount of expansion is consistent with the results of previous experiments.