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Abstract
In this paper, we discussed the phase change coupling algorithm of accumulation bank slope under the action of ice-snow melting. We described the effect of temperature gradient on the water migration of soil. We simplified the stress balance, continuity, and energy equation in the coupled model. We discussed the variation law of temperature, seepage, and stress (deformation) field under different conditions of ice-snow melting on the bank slope of the accumulation body. Based on the three-field coupling energy balance equation of ice-snow melting with phase change, the simplified algorithm of three-field coupling is obtained. The simplified algorithm is applied to the coupling model of ice-snow thawing on indoor accumulation bank slope. We established a practical numerical model for the coupling analysis of temperature, seepage, and stress field. We established the coupled control differential equation of three fields. We investigated the three-dimensional numerical simulation of stress, displacement, plastic deformation, and other indicators. The results show that the numerical simulation results are in good agreement with the monitoring results. It is expected that the research results can more truly simulate the actual characteristics of ice and snow melting water on the bank slope of the Three Gorges Reservoir and provide reference for the prevention and prediction of extreme snow and ice disasters in the Three Gorges Reservoir area.
Highlights
A rapid huge landslide occurred in Yi Gong River in Bome, Tibet, on April 9, 2000 [1]. e Yi Gong landslide is caused by the melting of snow and ice on Xuefeng Mountains, resulting in the formation of debris flow, which was a huge disaster [2]
A large number of landslides occurred from February to March 2006 due to the melting of ice and snow [5,6,7,8]. e extreme ice-snow disaster climate rarity appears in the ree Gorges Reservoir area, and the probability is very small. e geological disaster caused by it has not been paid enough attention. ere is a great difference with the alpine region, in the topography, geological environment, and climate environment
We studied the boundary conditions of unsteady seepage. e ice-snow melting caused infiltration and runoff generation on the slope. e boundary conditions are determined by the melting water strength and the infiltration rate
Summary
A rapid huge landslide occurred in Yi Gong River in Bome, Tibet, on April 9, 2000 [1]. e Yi Gong landslide is caused by the melting of snow and ice on Xuefeng Mountains, resulting in the formation of debris flow, which was a huge disaster [2]. Under extreme snow and ice disaster conditions, the law of landslide disaster triggered by snow melting is similar to that of heavy rainfall [9, 10]. Advances in Civil Engineering to adjust the infiltration flow according to the change of water content so as to realize the numerical simulation of ice-snow melting infiltration [17] At this time, the snow cover only changes temperature and does not change phase [18]. E rare ice-snow climate occurred in the ree Gorges Reservoir area is rare, and the geological disaster caused by it has not been paid enough attention. In the middlelow latitudes of the ree Gorges Reservoir area, the theoretical, experimental, and numerical studies on the types of geological disasters and their influencing mechanisms under extreme ice and snow disasters are basically blank. Based on the three-field coupling energy balance equation of ice-snow melting with phase change, the simplified algorithm of three-field coupling is obtained. e simplified algorithm is applied to the coupling model of ice-snow thawing on the indoor accumulation bank slope
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