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Full-scale mechanically stabilized earth (MSE) walls under strip footing load

机译：带钢基础荷载作用下的全尺寸机械稳定土（MSE）墙

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摘要

This study analyses two full-scale model tests on mechanically stabilized earth (MSE) walls. One test was conducted with a rigid and one with a flexible wall face. Other parameters were the same in these two tests, like the number and type of geogrid layers, the vertical distance between the layers and the soil type. The loads and strains on the reinforcement are measured as function of the horizontal and vertical earth pressure and compared with analytical models. Specifics regarding the behavior of the geogrids under the compaction load during the construction of the model and under strip footing load are included in the study. Results are compared with AASHTO and the empirical K-stiffness method. In this study, an analytical method is developed for the MSE walls taking into account the facing panel rigidity both after backfill construction and after strip footing load. There is good agreement between the proposed analytical method and the experimental results considering the facing panel rigidity. The results indicate that the tensile force on reinforcement layers for rigid facing is less than the flexible facing. The maximum strains in the reinforcement layers occurred in the upper layers right below the strip footing load. The maximum wall deflection for the flexible facing is more than for the rigid facing. The maximum deflection was at the top of the wall for the rigid facing and occurred at z/H = 0.81 from top of the wall for the flexible facing.
机译：这项研究分析了对机械稳定土（MSE）墙的两个全面模型测试。一种测试是用刚性的，另一种是用柔性壁的。在这两个测试中，其他参数相同，例如土工格栅层的数量和类型，层之间的垂直距离和土壤类型。根据水平和垂直土压力测量钢筋上的载荷和应变，并与分析模型进行比较。研究中包括有关土工格栅在模型构建过程中的压实载荷和条形基础载荷下的行为的详细信息。将结果与AASHTO和经验K刚度方法进行比较。在这项研究中，针对MSE墙开发了一种分析方法，该方法考虑了回填施工后和带钢基础荷载后面板的刚度。考虑到面板的刚度，所提出的分析方法与实验结果之间有很好的一致性。结果表明，用于刚性面层的增强层上的张力小于柔性面层。钢筋层中的最大应变出现在带材基础荷载正下方的上层中。柔性面的最大壁挠度大于刚性面的最大壁挠度。对于挠性饰面，最大挠度在壁的顶部，对于挠性饰面，最大挠度在壁的z / H = 0.81处发生。

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