冻融循环下加筋膨胀土边坡稳定性模型试验

China has a large area of frozen soil, and the long-term stability of the expansive soil slopes in the seasonal frozen area can be guaranteed by controlling the deterioration of the slopes in freezing and melting cycles. In order to determine the role of geogrid in the stability of the expansive soil slopes during the freeze-thaw cycle, the model test of the expansive soil slope is carried out in this paper. The results show that: 1)The geogrid can restrain the freeze-thaw cracks of expansive soil, make the crack development more uniform, and reduce the slope displacement; 2)The reinforced material can inhibit the water migration and heat conduction of the slope and reduce the change of soil pressure; 3)The reinforced treatment of expansive soil slope can significantly reduce the fluctuation of water content, so as to reduce the swelling and shrinking of expansive soil caused by the change of water content; 4)Different from ordinary clay, the expansive soil slopes show the characteristics of freeze shrinkage and thaw expansion in the freeze-thaw cycle, and the slope reinforcement can effectively improve the freeze-thaw stability of expansive soil slopes in frozen soil areas, which has engineering application value.