关键词: 土质边坡滑移, 冻融模拟试验, 土体损伤系数

Abstract:

In order to study the shallow landslide hazard of soil slope during the spring melt period in seasonal frozen areas, considering that the freezing point of the brine is lower than pure water, a simulated test method of the internal freezing and thawing interface of soil slope is designed. The critical slip surface depths after freeze-thaw circles in different water contents are compared in the test; and the failure modes of the internal freezing and thawing interface of soil slope are verified. Then the sliding face depth damage model of the soil slope is put forward according to the experimental data. The results demonstrate that with the increasing water content and freeze-thaw circle times, the value of critical slip surface depth decreases gradually after freeze-thaw circles; the damage model which is obtained from the experimental data fitting, would present more reference of the slope design in the seasonal frozen area.

Key words: soil slope landslide, freezing and thawing simulated test, soil damage coefficient