2018 年 6 巻 1 号 p. 156-166
In this study, freeze-thaw experiments were conducted on saturated fine-grained soils using different pre-consolidation pressures and overburden loads in order to predict the permeability of freeze-thawed soil. Two types of freeze-thawed experiments were carried out with the artificial ground freezing on-site construction condition considered: (1) one-dimensional freeze-thaw test, and (2) a horizontal displacement restrained freeze-thaw and vertical permeability test, which enables horizontal freezing under restricted horizontal displacement. The results show that the permeability of freeze-thawed soil is obviously influenced by overburden pressure rather than pre-consolidation pressure, overconsolidation ratio, and frost heave ratio. The results also suggest that the permeability of freeze-thawed soil can be predicted by the freeze-thaw test in which the effective overburden pressure is considered, rather than strength or over consolidation ratio of the ground materials and other freezing conditions.