In this study, a fiber-reinforced rubber-sand mixture (FRRSM) was produced by adding random distribution reinforcement of polypropylene fiber recycled from waste plastic, which can strengthen the RSM. The mechanical parameters of FRRSM were tested using indoor experiments. Moreover, the seismic behavior of a wrapped reinforced earth retaining wall backfilled with FRRSM was investigated using the finite element method. First, by comparing the model test results, the accuracy of the nonlinear finite element analysis method, which simulated the earthquake response of a retaining wall well, was verified. Subsequently, the soil used in the model test was replaced with FRRSM, and the facing displacement, vertical settlement, and acceleration response of the retaining wall were analyzed. The results indicate that the seismic performance of the retaining wall was significantly enhanced with an increase in the fiber content () of the FRRSM. According to the present research, the optimal mixture ratio that can ensure the seismic performance of FRRSM-RW is 10% rubber and 1.5% fiber, that is, = 10% and = 1.5%.

中文翻译：

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聚丙烯纤维增强橡胶砂混合料回填包裹式挡土墙的抗震性能

在这项研究中，通过添加从废塑料中回收的聚丙烯纤维的随机分布增强材料来生产纤维增强橡胶砂混合物（FRRSM），这可以增强RSM。FRRSM的力学参数通过室内实验进行测试。此外，采用有限元方法研究了FRRSM回填的包裹式加筋土挡土墙的抗震性能。首先，通过模型试验结果对比，验证了非线性有限元分析方法模拟挡土墙地震反应的准确性。随后，将模型试验中使用的土体替换为FRRSM，并对挡土墙的面位移、竖向沉降和加速度响应进行分析。结果表明，随着FRRSM纤维含量()的增加，挡土墙的抗震性能显着增强。根据目前研究，能够保证FRRSM-RW抗震性能的最佳配比为10%橡胶和1.5%纤维，即=10%和=1.5%。