复杂条件下格宾网箱生态护坡稳定性分析

依托2022年冬奥会国家跳台滑雪场高切坡工程,为探究新型格宾网箱生态护坡的稳定性,采用有限元软件MIDAS/GTS NX,基于强度折减法开展地震、降雨及地震与降雨共同作用的复杂条件下格宾网箱生态护坡整体稳定性数值模拟分析。基于极限平衡原理推导了格宾网箱护坡结构的自身抗滑移稳定系数计算公式,并对其自身稳定性进行分析评价。结果表明:新型格宾网箱支护结构体系对边坡整体稳定性影响较小,且能够有效限制边坡位移,地震作用下的护坡效果尤其显著,其自身也具有良好的自稳定性,可较好地适用于国家跳台滑雪场高切坡的生态支护,可为类似高山滑雪赛道工程的生态护坡提供参考。

Stability analysis of slopes with ecological gabion cages under complex conditions

In order to explore the stability of the slopes reinforced by gabion ecological cages, the finite element software MIDAS/GTS NX was used to carry out the numerical simulation of the high-cut slope project of the National Ski Jumping Center which will be accommodating 2022 Winter Olympics. The overall stability of the slope with gabion ecological cages under complex conditions of earthquake, rainfall and the combined effect of earthquake and rainfall were studied using the strength reduction method. Based on the principle of limit equilibrium, the calculation formula of the anti-sliding stability coefficient of the slope structure was derived, and then used to evaluate its own stability. The results show that the new gabion support structure system has little adverse effect on the overall stability of the slope, and can effectively limit the slope displacement, especially under the condition of earthquakes. It indicates that the structure has the advantage of self-stability characteristics; it is suitable for the high-cut slope project of the National Ski Jumping Center. This study can provide a reference for the engineering of ecological slopes of similar alpine ski track projects.