地震荷载作用下加筋高边坡的稳定性分析

Analysis of Stability on Reinforced Soil Slope under the Action of Earthquake Load

为了更加准确地分析加筋高边坡在地震荷载作用下的稳定性,采用拟静力法结合有限元软件和强度折减法分析了加筋高边坡在不同地震荷载作用下的安全系数,经过分析,发现水平地震荷载对边坡的稳定性影响更大,水平向外的地震加速度最大只能加到0.154 g,竖直向下的加速度最大可以加到0.318 g。通过对最不利情况下地震加速度的计算分析,绘制了加筋高边坡在地震荷载作用下安全系数的空间曲面图。并且定义了安全系数的影响因子η,计算了各个方向上地震加速度对安全系数的影响,从而确定出最危险的地震加速度方向为水平方向,为加筋高边坡的抗震设计提供了参考。

In order to precisely analyze the stability of reinforced soil slope under the action of earthquake load, a method combining finite element method, pseudo static analysis and strength reduction method are adopted to calculate the safety factor of reinforced soil slope under condition of earthquake load. The re- sults show that the stability of reinforced soil slope is more sensitive to the acceleration of horizontal. In the analysis, the most acceleration of horizontal is -0.154 g and the most acceleration of vertical is 0.318 g.Through the calculation of seismic acceleration of different directions, the surface diagram of safety fac- tor of reinforced soil slope under earthquake load is obtained. And is defined to evaluate the effect of earth- quake of different directions and the horizontal direction is the most dangerous. This research provides some effective reference for the earthquake resistant design of reinforced slope.