不同间距双荷载作用下土质边坡稳定性研究

文中利用ABAQUS有限元软件建立某土质边坡的二维模型,通过改变坡顶两个条形基础上部附加荷载之间的距离,研究不同间距双重荷载作用下边坡的变形破坏特征,并从竖向位移场、竖向应力场、等效塑性应变以及安全系数大小等角度对数值模拟结果进行分析。研究结果表明,边坡在双重荷载作用下,竖向位移的最大值集中于荷载作用的下方坡体,且随着间距的增加而减小,但减小幅度逐渐降低;竖向应力在荷载作用处出现较大值区,坡体内一定范围发生应力重分布现象;边坡的安全系数随着荷载间距的增大而得到提高,但间距存在一个临界值,即2倍的荷载作用宽度。以上结果对相关工程的建设具有一定的参考价值。

STABILITY OF SOIL SLOPE UNDER DOUBLE LOADS WITH DIFFERENT SPACING

Due to the increase of human engineering activities and the gradual shortage of land resources,some slopes are inevitably under the action of multiple loads,which has negative impact on the stability of the slopes.A two-dimensional model of a soil slope is established by ABAQUS software.By changing the distance between the two additional loads on the top of the slope,the deformation and failure characteristics of the slope under different spacing double loads are studied,and the numerical simulation results are analyzed from the vertical displacement field,vertical stress field,equivalent plastic strain,and safety factor.The results show that under the dual load,the maximum vertical displacement of the slope is concentrated in the lower slope under the load,and it decreases as the increase of the space with the decreasing amplitude;The vertical stress appears a larger value area at the load position,and the stress redistribution occurs in a certain range of the slope;The safety factor of the slope is improved with the increase of the load space.However,there is a critical value of the space,that is,twice the width of the load.The above results may have a certain reference value for the construction of related projects.