The correlation analysis of atmospheric temperature change and slope seepage

Based on the multi-phase flow & multi-field coupling theory, this paper adopted the finite element method to calculate the temperature distribution of Muyubao landslide as the atmospheric temperature changes. Further, it analyzed the influence of atmospheric temperature changes on the slope seepage according to the correlation between temperature and viscosity of water. The results of calculation showed that the effect of atmospheric temperature on temperature of the slope body is limited to the shallow surface; as the depth increases, the influence decreases and the hysteresis increases concurrently. The mobility of the water is affected by the change of the slope body’s temperature and it can change the water permeability in the inner slope. The effect of atmospheric temperature on permeability coefficient of the slope has a nonlinear relationship with depth. The effect of atmospheric temperature on the permeability coefficient declines as the depth increases. Generally, the permeability coefficient of the slope no longer change significantly when the depth is deeper than the maximum depth of infiltration. The permeability coefficient of the slope shows seasonal variation with the atmospheric temperature. The permeability coefficient decreases with the increase of depth when the atmospheric temperature is higher than the soil in summer. In contrast, the permeability coefficient increases with the increase of depth in winter.

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