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为分析地震作用下三维边坡的稳定性,基于最小势能原理,考虑滑裂面处的剪切势能和三向地震力对滑体的作用,建立地震作用下的三维边坡最小势能稳定性分析方法。将该方法与传统拟静力法相对比。分析三向地震力作用对边坡安全系数的影响。结果表明:该方法是合理可行的;水平向地震力对安全系数影响最大,横向与竖向地震力的影响相对较小,但不可忽略横向与竖向地震力对边坡稳定性的影响;滑体横向半长轴变化对安全系数的影响大于水平向和竖向的影响。
In order to analyze the stability of three-dimensional slope under earthquake action, based on the principle of minimum potential energy, considering the shear potential energy at the slip surface and the effect of three-direction seismic force on the slide body, the stability analysis of the minimum potential energy of the three-dimensional slope under earthquake action is established method. This method is compared with the traditional quasi-static method. The influence of three-direction seismic force on slope safety factor is analyzed. The results show that this method is reasonable and feasible. The horizontal seismic force has the greatest influence on the safety factor and the horizontal and vertical seismic forces have a relatively small influence. However, the effects of lateral and vertical seismic forces on the slope stability can not be neglected. The influence of the variation of the semi-major axis in the transverse direction on the safety factor is greater than that in the horizontal and vertical directions.