Ground vibration boom

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

Ground vibration boom is a phenomenon of very large increase in ground vibrations generated by high-speed railway trains travelling at speeds higher than the velocity of Rayleigh surface waves in the supporting ground.[1]

Technical background

Swedish high-speed train X 2000 approaching Ledsgard.

This phenomenon, which is similar to a sonic boom from supersonic aircraft, was theoretically predicted in 1994. Its first experimental observation took place in 1997-1998 on the newly built high-speed railway line in Sweden (from Gothenburg to Malmo) for high-speed trains X 2000. At some locations along this line characterised by very soft ground (near Ledsgard) the Rayleigh wave velocity was as low as 45 m/s, and train speeds of only 165–170 km/h were sufficient to observe the effect. In particular, the increase in train speeds from 140 to 180 km/h was accompanied by about tenfold increase in generated ground vibration level, which agrees with the theory. It is now understood that, with the increase of operating train speeds, this phenomenon represents a major environmental problem associated with building new high-speed railway lines.[2] [3] [4]

Mitigation measures

The most efficient way to mitigate ground vibration boom is to reduce train speeds at locations where Rayleigh wave velocities in the ground are very low.[5] If this is not desirable, e.g. for economic reasons, some mitigation measures can be applied, such as stiffening of railway embankments or building protective trenches and barriers between railways and residential or industrial buildings. Any mitigation measures would involve the specific ground investigation works along the route.[6]

See also

References

  1. ^ "Ground vibration boom", Railway Gazette, 1 June 1998.
  2. ^ "The Application and Effect of the Rayleigh Wave Speed Principle on High Speed Rail travel - Written evidence from David Rayney", UK Parliament Website, 15 May 2011.
  3. ^ "Derailment fears over high speed rail scheme", Express & Star, 20 February 2012.
  4. ^ "From the Archives: Rayleigh Waves and HS2", STOP HS2 Website, 8 July 2014.
  5. ^ "Railing against Rayleigh Waves", STOP HS2 Website, 14 March 2016.
  6. ^ "HS2 defends itself against derailment claims", Rail Technology Magazine, 14 March 2016.

Further reading

  • Krylov, V.V., On the Theory of Railway-induced Ground Vibrations, Journal de Physique IV, 4(C5), 1994, pp 769–772.
  • Skipp, B.O. (ed), Ground Dynamics and Man-made Processes, The Institution of Civil Engineers, London, 1998.
  • Krylov, V.V. (ed), Noise and Vibration from High Speed Trains, Thomas Telford Publishing, London, 2001.
  • Grundmann, H. and Schueller, G.I. (eds), Structural Dynamics: EURODYN 2002, A.A. Balkema, Lisse, 2002.
  • Takemiya, H. (ed), Environmental Vibrations: Prediction, Monitoring, Mitigation and Evaluation, Taylor & Francis Group, London, 2005.
  • Gilligan, A., High Speed Rail Link 'at Risk of Derailment' because of 225mph Trains, The Telegraph, 19 February 2012.

External links

  • Railway Induced Vibration Abatement Solutions (RIVAS)
  • Noise from the Railway - Network Rail
Retrieved from "https://en.wikipedia.org/w/index.php?title=Ground_vibration_boom&oldid=834180812"
This content was retrieved from Wikipedia : http://en.wikipedia.org/wiki/Ground_vibration_boom
This page is based on the copyrighted Wikipedia article "Ground vibration boom"; it is used under the Creative Commons Attribution-ShareAlike 3.0 Unported License (CC-BY-SA). You may redistribute it, verbatim or modified, providing that you comply with the terms of the CC-BY-SA