摘要
随着降雨的不断增加，膨胀土边坡浅层破坏问题愈加严重。本文基于降雨入渗对膨胀土边坡的影响，深入分析了入渗临界值的作用机制。研究表明，当降雨入渗量超过一定临界值时，膨胀土的力学性能发生显著变化，导致边坡出现浅层滑坡或破坏现象。通过数值模拟与现场实验相结合，揭示了降雨入渗深度与膨胀土边坡稳定性之间的密切关系，为相关工程设计提供了科学依据。研究成果为防治膨胀土边坡浅层破坏提供了新的思路。
关键词： 膨胀土；边坡；浅层破坏；降雨入渗；临界值
Abstract
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.
Key words： Expansive soil; Slope; Shallow damage; Rainfall infiltration; Critical value
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