条形荷载作用下粘土边坡稳定特征数值分析

Numerical Analysis of Clay Slope Stability under Strip Load

为分析坡顶条形荷载作用下的边坡稳定特征,运用有限元强度折减法,以均质粘土边坡为研究对象,在坡顶不同位置施加条形荷载,分析边坡稳定安全系数、坡体内最大剪应力、X方向最大位移以及潜在滑裂面位置4个指标的变化规律。结果表明,边坡稳定性与条形荷载值呈正相关,荷载距坡顶边缘越近,稳定性越差;坡体内最大剪应力、最大位移值与荷载值呈正相关,荷载离坡顶边缘较远时,最大剪应力出现在荷载右缘下方坡体中;坡顶边缘作用有大荷载时,坡体最大位移值增加较快;随着荷载向右移动,边坡潜在滑裂面也向右偏移。

Aimed at analyzing the slope stability under a strip load and based on the homogeneous clay slope and the strength reduction finite element method,a strip load was applied at different locations on the top of the slope,variations of the 4indices of the slope stability safety factor,the maximum shearing stress,the maximum displacement in the direction of Xand the location of the potential sliding surface were researched.The results indicated that slope stability was positively correlated with the strip load value,and the closer the load was to the edge of the slope top,the worse stability was;the maximum shearing stress and the maximum displacement value were positively correlated with the load value,and when the load is farther from the edge of the slope top,the maximum shearing stress occurred at the right edge of the load in the slope;the maximum displacement value increases sharply when a large strip load was applied at the edge of the slope top;the potential sliding surface of the slope was shifted to the right as the load moved to the right.