In this paper, based on field measurements for the passage of the Shinkansen high speed trains on viaducts, the author reports the induced ground vibration features at distinctly different sites: one site is characterized by a deep soft soil and the other by a shallow soft soil both of which lie on stiff bottom. The conventional vibration assessment is normally addressed to the vibration levels based on acceleration maxima. However, in view of the vibration reception by nearby residents, firstly, a detailed investigation is attempted on the recorded time histories and on their Fourier spectra, locating the so-called low frequency vibration generation at the former site and such vibration impediment at the latter site. Then, theoretical consideration is to clarify the Shinkansen-train induced ground vibrations from a viaduct. The characterization based on the wave theory using the thin layer method reveals that, depending on the depth of surface layer, the groundborne vibration is of significantly low frequency wave modes of dispersive propagation when it is deep or it makes the wave modes shifted towards higher frequency range when it is shallow. This finding makes an important element to better predict and assess vibration level and to develop barriers against it for mitigation.
Analyses of wave field from high-speed train on viaduct at shallow/deep soft grounds
Analyse der von Hochgeschwindigkeitszügen induzierten Wellenfeldern auf einem Viadukt bei flachen/tiefen weichen Gründungen
2008
19 Seiten, 19 Bilder, 20 Quellen
Conference paper
English
Analyses of wave field from high-speed train on viaduct at shallow-deep soft grounds
Online Contents | 2008
|Stockport train crash : viaduct disaster of 1948
SLUB | 2010
|Taylor & Francis Verlag | 2019
|The Piacenza viaduct for Milano-Bologna high-speed railway
British Library Conference Proceedings | 2003
|Optimized dimensioning of viaduct in Taiwan High speed rail
British Library Conference Proceedings | 2003
|