Research on shallow damage mechanism of water-rich soft rock slope under rainfall action
In order to study the deformation of water-rich soft rock slopes with shallow damage during rainfall infiltration,the article uses FLAC3D numerical simulation software to study the deformation law of the surface layer of the slope body and the distribution of the plastic zone during rainfall based on the three-dimensional spatial Darcy seepage theory.The results show that the change of the saturation degree of the surface layer of the slope body at the beginning of rainfall is related to the inclination angle of the slope body,the larger the inclination angle of the slope body is,the smaller the infiltration volume perpendicular to the slope surface is,which takes longer time for the surface soil to reach the saturation state.The deformation and plastic damage occurring in the slope body is mainly concentrated in the middle of the north slope,mudstone and sandstone,due to the serious weathering of the two kinds of rock bodies,which leads to the poor mechanical properties of these two kinds of rock bodies,and is more prone to shear damage under the action of hydraulic force.
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