不同地震力偏角下二阶边坡的稳定性分析

Stability of the Second-Order Slope Based on Different Seismic Force Angle

针对边坡在地震力作用下的稳定性问题,在毕肖普法中考虑受地震力影响产生切向力和竖向力,建立了线性二阶边坡受力模型,对不同地震力偏角范围内边坡安全系数的计算公式进行了推导.开发出工程计算软件进行迭代计算,分析了边坡台阶宽度比、坡率比以及地震力偏角的变化对边坡稳定性的影响,为边坡抗震设计提供了重要的参考依据.

Aiming at the problem of the slope stability under the seismic force,the vertical force and horizontal force formed in the earthquake are considered in Bishop Method.The stress model for the second-order slope was built.The equation of slope safety factors was derived.The engineering calculation software was developed to make iterative calculation.The influence of variation of width ratio,slope rate ratio and seismic force angle on slope stability were analyzed,which provides important reference basis for the seismic design of slope.