Abstract Ground-borne vibrations due to high-speed trains passage strongly depend, apart from the speed of the train, on the geometry of the railways as well as the properties of the underlying soil layer(s). The main aim of this study is to investigate the effectiveness of expanded polystyrene (EPS) blocks in mitigating soil vibrations induced on railway embankments for different subsoil and railway embankment material conditions. The EPS blocks are placed in suitable locations, either as embankment's side fill material, or trench filling material, or combination of the above. An efficient three-dimensional numerical model has been developed -in conjunction with a user-developed subroutine for applying the moving loads-to accurately calculate the dynamic response of the coupled embankment-soil model. Four typical soil types - categorized as rock, dense sand with gravels, stiff and soft clay - are investigated. In addition, the mechanical properties of the embankment material have been altered to assess to what extend they can affect the HST vibrations.

中文翻译：

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在各种土壤条件下使用 EPS 块减轻高速列车振动

摘要 除列车速度外，高速列车通过引起的地面振动很大程度上取决于铁路的几何形状以及下伏土层的性质。本研究的主要目的是研究发泡聚苯乙烯 (EPS) 砌块在减轻不同底土和铁路路堤材料条件下铁路路堤上引起的土壤振动的有效性。EPS 砌块放置在合适的位置，可以作为路堤的侧面填充材料，也可以作为沟槽填充材料，或者上述材料的组合。一个有效的三维数值模型已经开发出来 - 结合用户开发的用于施加移动载荷的子程序 - 以准确计算路堤 - 土壤模型的动态响应。四种典型的土壤类型 - 分类为岩石、带砾石的密沙、硬粘土和软粘土 - 进行了调查。此外，路堤材料的机械性能已经改变，以评估它们对 HST 振动的影响程度。