Mitigating high-speed train vibrations with EPS blocks for various soil conditionsMitigating high-speed train vibrations with EPS blocks for various soil conditions Peer-Reviewed Journal Publication Δημοσίευση σε Περιοδικό με Κριτές 2023-03-272021enThis research is co-financed by Greece and the European Union (European Social Fund - ESF) through the Operational Programme “Human Resources Development, Education and Lifelong Learning 2014–2020” in the context of the project “Strengthening Human Resources Research Potential via Doctorate Research – 2nd Cycle” (MIS 5000432).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.http://creativecommons.org/licenses/by/4.0/Soil Dynamics and Earthquake Engineering141 Lyratzakis Alexandros Λυρατζακης Αλεξανδρος Tsompanakis Ioannis Τσομπανακης Ιωαννης Psarropoulos Prodromos N. Elsevier High-speed trains Train-induced vibrations Railway embankments Mitigation measures Expanded polystyrene (EPS)