某顺层岩质边坡及其支护稳定性数值分析

Numerical Analysis of a Consequent Rock Slope and Its Supporting Stability

为研究顺层岩质边坡支护稳定性、改善边坡结构面易失稳的问题,以某岩质边坡为对象,通过数值模拟分析得到某岩质边坡在支护施作前后塑性区分布变化、整体位移以及剪切应力的变化规律。结果表明:在支护结构施作前后,边坡塑性区的面积分布、最大塑性应变值以及其位置都发生了改变,提高了边坡稳定性;施作支护结构后边坡的最大位移相对初始状态下减小31.2mm,对抑制边坡的变形效果显著;随着支护结构的施作,边坡剪应力整体分布趋势及剪应力最大值变化较小,边坡坡面最大剪应力分布情况变化明显,坡脚处剪应力逐渐减小,施工过程坡脚发生剪切破坏可能性较低。

In order to study the supporting stability of the consequent rock slope and improve the instability of structural plane of slope,taking a rock slope as an example,the variation laws of plastic zone distribution change,overall displacement and shear stress of a rock slope before and after supporting are obtained by the numerical simulation analysis.The results show that:before and after the construction of the supporting structure,the area distribution,the maximum plastic strain value and its position of the slope plastic zone have changed,which improves the stability of the slope;after the construction of the supporting structure,the maximum displacement of the slope decreases by 31.2 mm compared with the initial state,which has a significant effect on restraining the deformation of the slope;with the construction of the supporting structure,the overall distribution trend of the slope shear stress and the maximum value of shear stress change little,the distribution of the maximum shear stress of the slope surface changes obviously,the shear stress at the foot of the slope decreases gradually,and the possibility of shear failure at the foot of the slope is low during the construction.