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挡土墙稳定性评价一直是工程技术界很关心的研究课题。至今,已出现了较多的挡土墙稳定分析方法,如极限平衡法、极限分析法等。结合工程实例,采用有限元法中的强度折减法对某山区公路高挡土墙整体稳定性进行了分析,岩土体采用弹塑性D-P屈服准则,并考虑了多层岩土体的存在,最终给出该高挡土墙的整体稳定安全系数。应用该法不仅可以计算挡土墙整体稳定性系数,而且可以分析岩土体及挡土墙的位移、应力和应变。
Retaining wall stability evaluation has always been a subject of great concern to the engineering and technical community. So far, there have been more methods of retaining wall stability analysis, such as limit equilibrium method, limit analysis method. Combined with engineering examples, the strength reduction method of finite element method is used to analyze the overall stability of high retaining wall of a highway in mountain area. The elastic-plastic DP yield criterion is adopted for rock and soil, and the existence of multi-layered rock mass is considered. Finally, The overall stability and safety factor of the high retaining wall is given. The method can not only calculate the overall stability coefficient of retaining wall, but also analyze the displacement, stress and strain of rock mass and retaining wall.