Abstract The equivalent strength and stiffness of geosynthetic-encased soil are two important parameters for analysis of cellular geosynthetic-reinforced foundations and earth structures. However, limited analytical approaches exist for the estimation of these parameters, and this limitation hinders their applications in geotechnical engineering practice. In this study, an analytical method is proposed for the prediction of the stress-strain response of geosynthetic-encased soil by employing the soil response in the triaxial stress condition and the theory of thin cylinders. This method has the advantages of theoretical rigorousness and convenience for use and can consider soil nonlinearity, soil dilatancy, soil plasticity and soil-geosynthetic interaction. Different types of yield criteria for soils can be readily incorporated into the proposed method. The proposed method is validated against the results of triaxial compression tests on geosynthetic-encapsulated sand. The good agreement between the predicted stress-strain curves and the measured curves demonstrates the effectiveness of the method. In addition, design tables and parametric studies are provided by employing the formulated analytical method for application purposes.

中文翻译：

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三轴应力条件下土工合成材料包裹颗粒土的变形破坏分析

摘要 土工合成材料包裹土的等效强度和刚度是分析蜂窝式土工合成材料加固地基和土体结构的两个重要参数。然而，用于估计这些参数的分析方法有限，这种限制阻碍了它们在岩土工程实践中的应用。在这项研究中，利用三轴应力条件下的土壤响应和薄圆柱理论，提出了一种用于预测土工合成材料包裹土的应力应变响应的分析方法。该方法具有理论严谨性和使用方便的优点，可以考虑土体非线性、土体剪胀、土体可塑性和土-土工合成材料的相互作用。不同类型的土壤屈服标准可以很容易地结合到所提出的方法中。所提出的方法已根据土工合成材料包封砂的三轴压缩试验结果进行了验证。预测的应力-应变曲线与实测曲线之间的良好一致性证明了该方法的有效性。此外，通过采用用于应用目的的公式化分析方法，提供了设计表和参数研究。