Journal of Engineering Research

With the continuous increase in rainfall, the problem of shallow slope failure in expansive soil has become increasingly severe. Based on the impact of rainfall infiltration on expansive soil slopes, this paper conducts an in-depth analysis of the mechanism of critical infiltration thresholds. The study reveals that when rainfall infiltration exceeds a certain threshold, the mechanical properties of expansive soil undergo significant changes, leading to shallow slope failures or instability. Through a combination of numerical simulations and field experiments, the close relationship between rainfall infiltration depth and slope stability is demonstrated, providing scientific evidence for engineering design. These findings offer new approaches for preventing shallow slope failures in expansive soil.

Expansive soil; Slope; Shallow damage; Rainfall infiltration; Critical value