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提出并推导土体在冻结过程中由于冻结速度和水分迁移速度的影响 ,造成不连续分凝冰有单薄冰层、双冰层和厚冰层 3种发育模式 .采用受控试验的反演分析验证了不连续分凝冰的发育模式 .试验结果同时表明 :在整个试验期间 ,分凝暖端的孔隙冰压力变化平稳 ;当单薄冰层和双冰层发育时 ,冰分凝温度和孔隙水压力波动较大 ,尤其是在双冰层生长时 ,冻结缘发育最充分 ,分凝暖端的温度和孔隙水压力降低幅度最大 ;在厚冰层形成后 ,由于冻结锋面推移缓慢和冰层厚度的不断增加 ,冻结缘厚度减小 ,分凝暖端温度和孔隙冰、水压力趋于稳定 .
This paper proposed and derived three kinds of development modes of discontinuous sub-freezing ice, such as thin ice layer, double ice layer and thick ice layer, due to the influence of freezing velocity and water migration speed during the freezing process.Using the inversion analysis of controlled experiment The experimental results also show that during the whole experiment, the pressure of pore ice changes smoothly at the warm-end of condensate; when the single thin ice layer and double ice layer are developed, the freezing temperature and pore water pressure Especially in the double ice layer, the frozen edge developed most fully, and the temperature and pore water pressure in the warm and cold sub-condensate area decreased the most. After the formation of the thick ice layer, due to the slow cooling front and the ice thickness Increase, reduce the thickness of frozen edge, sub-condensate warm end temperature and pore ice, water pressure tends to be stable.