遵义某矿渣堆积型边坡稳定性研究

Stability study on a slag-accumulated slope in Zunyi

运用FLAC3D软件和改进的Mohr-Coulomb模型,对遵义市某矿渣堆积型边坡在新矿渣堆存及降雨入渗两种工况下的稳定性进行分析。研究表明:新矿渣堆存荷载对边坡稳定性有明显影响,其整体位移增大,沉降明显,坡表易出现隆起或裂缝;降雨入渗工况下,边坡土体容重增加,抗剪强度降低,局部出现较大变形,整体稳定性降低;为保护环境和维持边坡稳定,需在坡脚建立排水性良好的重力式挡墙,在坡表铺设黏土起到防止雨水下渗的作用,铺设种植土以便恢复生态环境。

This paper uses FLAC3D software and the modified Mohr-Coulomb model to analyze the stability of a slag-accumulated slope in Zunyi City under two operating conditions:new slag stockpile and rainfall infiltration.Research shows that the new slag stockpile load has a significant impact on the stability of the slope;its overall displacement increases,settlement is obvious,and the slope surface is prone to bulging or cracking.Under the rainfall infiltration condition,the soil bulk weight of the slope increases,the shear strength decreases,the local deformation is large,and the overall stability decreases.In order to protect the environment and maintain the stability of the slope,it is necessary to build a gravity-type retaining wall with good drainage at the foot of the slope,lay clay on the slope surface to prevent rainwater infiltration,and lay planting soil to restore the ecological environment.