THE FUNDAMENTAL STUDIES ON THE FROST HEAVING IN COHESIVE SOIL STRATUM

In order to investigate the mechanism of frost heaving in cohesive soil stratum, laboratory test was performed on cohesive soil.The main concluding remarks derived from these studies are as follows; i) Having high water content and high saturation, specimens tend to display great amount of moisture migration and large frost heave, especially for small freezing rate. ii) Frost heaving process consists of primary and secondary processes. Furthermore, a simple calculation method of frost heave in laboratory test was proposed. iii) Although the soil sample was in the same state, a different pattern of frost heaving pressure was produced for a variation of void distribution in the specimen. This characteristic is closely connected with occurrence of ice lens.