Mitigation of high-speed trains vibrations by expanded polystyrene blocks in railway embankments
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Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering) ISSN 1673-565X (Print); ISSN 1862-1775 (Online) www.jzus.zju.edu.cn; www.springerlink.com E-mail: [email protected]
Mitigation of high-speed trains vibrations by expanded polystyrene blocks in railway embankments* Alexandros LYRATZAKIS1, Yiannis TSOMPANAKIS†‡1, Prodromos N. PSARROPOULOS2 1 2
School of Environmental Engineering, Technical University of Crete, Chania 73100, Greece
School of Rural and Surveying Engineering, National Technical University of Athens, Athens 1577, Greece †
E-mail: [email protected]
Received Dec. 31, 2019; Revision accepted May 8, 2020; Crosschecked Aug. 9, 2020
Abstract: The vibrations induced by the passage of high-speed trains (HSTs) are considered a crucial issue in the field of environmental and geotechnical engineering. Several wave barriers have been investigated to reduce the detrimental effects of HST-induced vibrations. This study is focused on the potential implementation of an innovative mitigation technique to alleviate the developed vibrations. In particular, the use of expanded polystyrene (EPS) blocks as partial fill material of embankment slopes was examined. The efficiency of the proposed mitigation technique was numerically investigated. More specifically, a 3D soil-track model was developed to study the cross-section of a railway track, embankment, and the underlying soil layers. The passage of the HST, Thalys, was simulated using a moving load method, and the soil response was calculated at several distances from the track. Several parameters influenced the effectiveness of the examined mitigation measure. Therefore, to ensure an optimal design, a robust procedure is necessary which considers the impact of these factors. Hence, the implementation of EPS blocks on several embankments with different geometry, in terms of height and slope angle, was investigated. Key words: High-speed railways (HSRs); High-speed trains (HSTs); Traffic-induced vibrations; Mitigation measures; Expanded polystyrene (EPS) https://doi.org/10.1631/jzus.A1900680 CLC number: U213
1 Introduction The major disadvantage of conventional means of transportation, such as cars or busses, is traffic congestion. That issue led to the investigation of alternative solutions for speed and comfort, as well as environmentally friendly transportation. One of the best solutions to this problem is transportation via ‡
Corresponding author Project supported by Greece and the European Union (European Social Fund) 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” (No. MIS 5000432) ORCID: Yiannis TSOMPANAKIS, https://orcid.org/0000-00028999-0500 © Zhejiang University and Springer-Verlag GmbH Germany, part of Springer Nature 2020
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high-speed trains (HSTs). However, with the progress of train technology and the increasing speed of HSTs, traffic-induced vibrations
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