类土质边坡的稳定性分析

根据类土质边坡的基本特性,从有限元计算方法、边界条件、滑动面处理、本构模型和计算参数等方面对其稳定性进行了研究;针对滑坡变形的破坏机理,结合具体工程实例,对有软弱结构面和无软弱结构面的两种滑坡模式进行了数值分析.通过对比得出,类土质边坡考虑软弱结构面时,安全系数和稳定性明显降低,最大塑性剪应变集中在结构面处,水平位移的突变和潜在滑动也都发生在软弱结构面处,与不考虑软弱结构面的情况相比更符合类土质边坡的特性和破坏机理.

Study on Stability Analysis of Soil Similar Slope

According to the porperties of soil similar slope, its stability was analyzed through researching on the finite element method, boundary conditions, the sliding surface treatment, constitutive model and calculation parameters. After considering the spe- cific projects and the problems such as landslides, deformation and damage, numerical analysis model was established. The numerical analysis of the two landslides model with week structural plane or no week structural plane was done. The comparison analysis results proved that safety coefficient would decrease obviously and maximum plastic prin- cipal shear strain would focus on the weak structural plane while considering the struc- tural plane of soil similar slope. Horizontal displacement could change on the weak structural plane. Potential sliding would happen and slope stability may cut down great- ly. The contrastive analysis proved that whether the week structural plane is considered or not could be very different, and the former would be more practical.