Stability Analysis of Multi-layer Unsaturated High Slope Cuttings under Rainfall Conditions
This study integrates the strength theory of unsaturated soil with finite element simulation of saturated-unsaturated rainfall infiltration to analyze the impact of short-duration intense rainfall and long-duration rainfall on the stability of multilayered unsaturated high-cut slopes.It also examines the variation of prestressed anchor cable axial forces.Under short-duration intense rainfall,the shear strength of the slope's rock and soil diminishes rapidly,significantly increasing the risk of slope instability.For long-duration rainfall,either higher rainfall intensity for the same duration or longer duration at the same intensity leads to a greater reduction in the slope's safety factor.The formation of transiently saturated zones is directly influenced by rainfall intensity,while the extent of these zone's expansion is linked to rainfall duration.Deeper rainfall infiltration is associated with higher rainfall intensity or longer duration,with a positive correlation observed between anchor cable axial forces and both rainfall intensity and duration.
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