【摘要】 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 .更多还原

【Abstract】 Three growth patterns of discrete ice including single thin ice lay,dual ice lay and thick ice lay were advanced and deduced owing to the influences of freezing rate and rate of water migration during soil freezing.Growth patterns of discrete segregating ice were veri- fied by using back analysis of the controlled tests.Meanwhile,the results of tests also showed that pore ice stress of warm end of segregating ice changed smoothly in the whole period of tests.With the growth of single thin ice lay and dual ice lay,ice segregation tem- perature and pore water stress greatly fluctuated.Particularly,during the growth of dual ice lay,the frozen fringe had the most sufficient growth and temperature of warm end of segre- gation and pore water stress had the lowest values.After the formation of thick ice lay,the temperature of warm end of segregation and pore ice and water stress stabilized gradually be- cause of slow freezing rate,thickening ice lay and thinning frozen fringe.更多还原