Exprimental Researches on the Frost Heaving Phenomena

[摘要] This investigation was carried out in order to co_??_firm the theory that the frost heaving is caused by the ice filaments occured under the ground. An apparatus was designed for producing the frost heaving and was used in the cold chamber belonging to the Low Temperature Laboratory.The paocess of the segregation of ice in the f_??_ozen soil is found to be as follows. As the freezing of soil proceeds, hair cracks. take place just below the freezing line, the cracks are filled with ice, thin ice layers are formed, they becomes thicker, the next cracks take place below the ice layers thus produced, the second cracks are again filled with ice. When the freezing line stops to descend for a long while and the water is continuously supplied from the unfrozen soil below, the ice layers grow into thick ones which the composed of ice filaments.Adjusting the temperature of the atmosphere and that of subgrade water, any specified form of segregation of ice are produced in the laboratory.

[学科分类] 大气科学