摘要：According to the characteristics of capillary water and membrane water in the pores, this article, based on the basic principles of fluid dynamics and thermodynamics, established the pore boundary and freezing law of capillary water and membrane water through literature reading and data statistics. The analysis of the research results shows that the frozen macropores generate suction at the curved ice-water interface, which drives the capillary water and film water in the unfrozen pores to migrate inside the fro- zen macropores. The freezing process can be dividedinto three stages: supercooling, rapid decline, and stable. However, there are only stable and fast melt- ing stages in the melting process, and there is nooverheating corresponding to the supercooling phe- nomenon. According to the low-field-NMR test of the silt during the freezing process, the boundary be- tween capillary water and film water was proved, and the correctness of the capillary-film water mi- gration model and migration path was verified.
关键词：Frozen soil;Capillary water;Nuclear magnetic resonance;Hysteresis
