Minimal data set.

The primary factor influencing slope stability is the variation of internal mechanics within the soil-rock mixture caused by rainfall infiltration. Most existing research has focused on how rock content affects the failure of soil-rock mixture slopes. However, there has been insufficient investigation into the coupling effects of rainfall intensity and slope inclination on the stability of soil-rock mixture slopes. Therefore, the model test of soil-rock mixture slope was carried out. The coupling effects of rainfall intensity and slope inclination on water content, earth pressure, pore water pressure, and failure mode of soil-rock mixture slope were analyzed. The failure mode of soil-rock mixture slope induced by rainfall was revealed. The results indicated that an increase in rainfall intensity and slope inclination significantly contributed to the instability of soil-rock mixture slopes and the loss of fine particles. Additionally, the maximum values of water content, earth pressure, and pore water pressure increased progressively. Considering the two influencing factors of rainfall intensity and slope inclination, the calculation formulas related to the fine particle content, maximum water content, maximum earth pressure, and maximum pore water pressure of soil-rock mixture slope were established. The findings of this research provided theoretical support for the construction of soil-rock mixture slopes and the prevention and control of landslide disasters.

影响边坡稳定性（slope stability）的核心因素为降雨入渗（rainfall infiltration）引发的土石混合体（soil-rock mixture）内部力学特性演化。现有多数研究多聚焦于石块含量对土石混合体边坡破坏的影响，但针对降雨强度（rainfall intensity）与边坡倾角（slope inclination）耦合效应对土石混合体边坡稳定性的研究仍存在不足。为此，本研究开展了土石混合体边坡模型试验，分析了降雨强度与边坡倾角耦合作用下，土石混合体边坡的含水率（water content）、土压力（earth pressure）、孔隙水压力（pore water pressure）及破坏模式（failure mode）的变化规律，揭示了降雨诱发的土石混合体边坡破坏模式。研究结果表明，降雨强度与边坡倾角的提升会显著加剧土石混合体边坡失稳与细颗粒流失现象；同时，含水率、土压力与孔隙水压力的峰值均呈逐步递增趋势。结合降雨强度与边坡倾角两个影响因素，本研究建立了针对土石混合体边坡细颗粒含量、最大含水率、最大土压力及最大孔隙水压力的相关计算公式。本研究成果可为土石混合体边坡工程建设与滑坡灾害防控提供理论支撑。