Abstract: Throughout the sitespecific investigation, the engineering geological conditions of the Fenghuangshan landslide in gravelly soils in Zhenjiang City are evaluated. Samples were taken for laboratory tests to determine the physical and mechanical parameters of the soil. By using the finite element method, the effects of rainfall, the slope shear strength, and the stiffness on the sliding surface and the slope displacement were evaluated. The analysis results show that the main mechanism of the disintegration deformation of landslides containing crushed stones is the displacement difference between various parts of the landslide during the sliding process, which in turn leads to the formation of micro tensile cracks and ultimately the disintegration. The rainfall is the main factor leading to the disintegration and the excessive deformation of Fenghuang Mountain gravelly soil landslide. The simulation results show that the maximum horizontal displacement of the sliding surface reaches 0.577m and the maximum vertical displacement reaches 0.413m under rainstorm conditions, both of which occur near the slope toe. The maximum horizontal displacement of the slope surface reaches 0.787m and the maximum vertical displacement is 0.312m, both of which occur in the middle and lower parts of the slope. Micro tension cracks may occur at these locations, which may lead to the risk of disintegration and the deformation of the slope. Artificial slope cutting, differences in slope strength, large terrain undulation, and the deterioration of underlying bedrock mechanical properties can all increase the slope displacement and increase the risk of disintegration and deformation. The research results can provide a basis for the investigation and treatment of similar landslides in the region.
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〖WTHZ〗Key words\ 〖WTBZ〗Landslide In Gravell Soil; Disintegration Deformation; Rainfall
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