红粘土边坡失稳机理及影响因素灵敏度研究

Study on Red Clay Slope Instability Mechanism and the Sensitivity of Influencing Factors

针对山西黄土高原地区特殊的红粘土边坡失稳特征,基于工程地质勘察与颗粒流细观模拟,总结边坡的失稳现象及规律,利用MIDAS/GTS建立3维边坡模型,分析边坡的失稳机理。通过正交试验分析了5种因素对边坡稳定性影响的灵敏度,由强到弱依次为内摩擦角、地震作用、粘聚力、地下水位和重度。根据各影响因素对边坡稳定性影响的主次关系,对东露天矿边坡工程提出合理的治理建议,为红粘土边坡的稳定性研究和此类边坡失稳的防治提供有益参考。

Aimed at the instability characteristics of special red clay slope in Shanxi loess plateau area, the instability phenome- non and rule of slope were summarized based on the engineering geological investigation and particle flow simulation analysis. MIDAS/GTS was used to establish the 3D slope model, so as to analyse the instability mechanism of slope. The sensitivity of five factors affecting the slope stability was analysed by the orthogonal tests. It concluded that the sensitivity from strong to low was internal friction angle, earthquake effect, cohesion, underground water level and unit weight. According to the primary and secondary relations of each factor on the stability, the reasonable treatment methods were proposed for the east open-pit mine, which could provide beneficial reference for the stability study and prevention of red clay slope.