Rainfall Infiltration And Stability Analysis Of 3D Slope

Many kinds of main geological disasters, disaster for the whole city slope landslide failure, the factors influencing the slope stability are also diverse, rainfall is the major factor inducing landslide. When analyzing stability and seepage in the slope during rainfall, in order to facilitate the calculation will usually be simplified as a two-dimensional slope treatment in three-dimensional state of nature, neglecting the effect of the 3D effect of rainfall slope, it is obvious that this does not reflect the rainfall infiltration process and the influence of rainfall on slope stability.For a 3D slope, slope shape will affect the surface runoff depth and flow, and then affect the rainfall infiltration and slope stability; on the other hand, although generally considered by the calculation of two-dimensional engineering analysis method that is the result of on the safe side, but in some cases, the three dimensional boundary effect of slope body is can not be ignored, otherwise it will cause the construction waste or landslide mechanism of miscarriage of justice. In this paper, through the two development in the large-scale finite element software ABAQUS, established a reasonable 3D slope rainfall infiltration model, considering the surface runoff and groundwater flow interaction on the fluid solid coupling calculation. The paper from four aspects the nature of the soil, the slope boundary conditions, rainfall intensity, slope of 3D geometry, deeply and systematically discusses the condition of rainfall slope under rainfall infiltration and stability. Through the two-dimensional model compared with the calculation results under the same conditions, analysis of the impact of the 3D effect of rainfall infiltration and slope stability.