Abstract The paper presents a numerical modeling study on the bearing capacity of two-tiered reinforced soil retaining walls. Numerical simulations are carried out using the finite element limit analysis (FELA) method, which is validated against results from model tests and other numerical simulation studies. Parametric analyses are carried out to examine the influences that footing location and width, upper wall setback, and reinforcement properties could have on the bearing capacity of two-tiered reinforced soil retaining walls. Results indicate that the variation of bearing capacity with footing distance from the facing is humped-shaped when the footing is located directly above the reinforced zone; the influences of upper wall setback and reinforcement length on bearing capacity diminish with the height of upper wall; and, the bearing capacity of the footing when placed near the wall facing can depend on the ratio of the reinforcement tensile strength values used in the two tiers of the wall. These findings are explained in conjunction with the geometries of slip planes observed in the numerical models.

中文翻译：

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基础荷载作用下两层加筋土挡土墙承载力及破坏机理

摘要 本文对两层加筋土挡土墙的承载力进行数值模拟研究。数值模拟是使用有限元极限分析 (FELA) 方法进行的，该方法已根据模型测试和其他数值模拟研究的结果进行验证。进行参数分析以检查基础位置和宽度、上墙后退和加固性能对两层加筋土挡土墙承载力的影响。结果表明，当基脚位于加筋区正上方时，承载力随基脚距饰面距离的变化呈驼峰状；上墙后退和配筋长度对承载力的影响随着上墙高度的增加而减小；和，靠近墙面放置的基础的承载能力取决于两层墙中使用的钢筋抗拉强度值的比率。这些发现与数值模型中观察到的滑移平面的几何形状一起解释。