Abstract This study aimed to investigate the applicability of the 1g similitude law to the physical modeling of soil-track interaction. Model track experiments were performed using four physically modeled soil-track systems with different geometric scale factors, under three different relative densities of the model ground. Based on the modeling of the model technique, the results of the physical models were compared in terms of the largest physical model scale. The soil-track interaction behaviors showed similar tendencies on the whole, but slight differences were also observed depending on the geometric scale factor. Such differences, however, were not significant compared to the differences in relation to other soil-structure interaction problems. Moreover, considering that the shearing action on the soil-track interface is a large replica of the shearing process in the direct shear tests of the soil, the differences among the physical models were attributed to the specimen size effect observed in the direct shear test of the soil, rather than to the similitude relationships. Therefore, it can be concluded that the 1g similitude law can be applied to the assessment of the soil-track interaction behavior, provided that the mechanical boundary restraint of the shearing action on the soil-track interface is properly accounted for.

中文翻译：

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1g 相似定律在土轨相互作用物理建模中的适用性

摘要 本研究旨在探讨1g相似定律在土轨相互作用物理建模中的适用性。在模型地面的三种不同相对密度下，使用具有不同几何比例因子的四个物理建模土壤-轨迹系统进行模型轨迹实验。在模型技术建模的基础上，以最大物理模型尺度对物理模型的结果进行了比较。土壤-轨道相互作用行为总体上表现出相似的趋势，但根据几何比例因子也观察到细微的差异。然而，与其他土壤-结构相互作用问题的差异相比，这种差异并不显着。而且，考虑到土-轨道界面上的剪切作用是土直接剪切试验中剪切过程的大复制，物理模型之间的差异归因于土直接剪切试验中观察到的试样尺寸效应，而不是相似关系。因此，可以得出结论，只要适当考虑了剪切作用在土轨界面上的机械边界约束，1g 相似定律可用于评估土轨相互作用行为。