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土石混合体是自然界中分布广泛的一种地质材料,受组分多样性,块石粒径大小不一和块石空间分布位置随机等因素的影响,其物理力学性质十分复杂。在土石混合体边坡的稳定性分析中,以往大多将其简化为均匀地质体结构而不考虑块石的影响。该文采用有限元强度折减法,对土体和四种不同类型块石分布的土石混合体边坡分别在自重状态(准静态)和打桩作用(动态)下的稳定性进行了分析,探讨了块石空间分布对剪切带和边坡稳定性的影响。计算结果表明,土石混合体边坡内的剪切带具有明显的绕石效应,位于土石混合体边坡内部不同位置处的块石对边坡稳定性产生的影响不同。
Soil-rock mixture is a kind of geological material widely distributed in nature. Its physical and mechanical properties are very complicated due to factors such as diversity of components, different sizes of rock particles and random distribution of rock blocks. In the stability analysis of soil-rock mixture slope, most of them have been simplified to uniform geologic structure without considering the influence of rock and stone. In this paper, the stability of soil-rock mixture slopes with different types of block-rock distribution under dead weight (quasi-static) and pile-driving (dynamic) conditions are analyzed by finite element strength reduction method. Influence of rock mass spatial distribution on stability of shear zone and slope. The calculated results show that the shearing zone in the slope of soil-rock mixture has obvious winding effect, and the rock mass located at different positions within the slope of soil-rock mixture has different effects on slope stability.