Stability Analysis and Parameter Sensitivity Analysis of Slopes Under Rainfall Infiltration Conditions

This study analyzed the stability of slopes under rainfall conditions and conducted a sensitivity analysis on the influence of various soil parameters on slope stability. By using numerical simulations of multiple physical fields, relevant slope models were established to simulate the variations of slopes under rainfall conditions, enabling the assessment of slope stability. By changing key parameters such as soil density, cohesion, and internal friction angle, the degree of their influence on slope stability was evaluated to identify the factors with significant impact. Under rainfall infiltration conditions, this study demonstrated the deformation, displacement, and stress distribution of slopes. The slope displacement was approximately 4 cm. The stability of slopes decreased under different rainfall conditions, reaching its lowest value after 3–5 days of rainfall infiltration. Subsequently, the stability began to recover and converged to a stable value. The sensitivity analysis of parameters showed that the sensitivity varied among different influencing factors in different rock and soil layers. Based on the numerical analysis of slope stability under rainfall conditions, it was observed that the intensity of rainfall had a significant impact on slope stability. The conclusions of this study have practical implications and provide valuable references for engineering practice.