Optimising soil stiffness on high speed rail lines to prevent vibration

Kaitai Dong, Omar Laghrouche, David P. Connolly, Peter K. Woodward, Pedro Alves Costa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The fast movement associated with high speed trains can cause significant dynamic effects within the supporting railway track structure. The speed at which maximum dynamic response occurs is known as the 'critical velocity' and is undesirable because large rail vibrations are generated when travelling close to it. These vibrations can cause a safety concern, and also propagate to the free-field where they disturb nearby buildings. A method to minimise these vibrations is to stiffen the soil directly below the track either via soil replacement or soil improvement, however both options are expensive. Their cost can be reduced though if either the depth or stiffness magnitude of the replacement is optimised. Therefore this work develops a track-ground model using the thin-layer method, which is capable of assessing the effect of different combinations of soil improvement on track vibration levels. It is shown that if improvement is carefully designed, performance can be maximised for minimum cost. Similarly, if improvement is poorly chosen, it can result in marginal improvement, and in some cases even amplify track vibration

Original languageEnglish
Title of host publicationProceedings of the 26th International Congress on Sound and Vibration
PublisherCanadian Acoustical Association
ISBN (Electronic)9781999181000
Publication statusPublished - 2019
Event26th International Congress on Sound and Vibration 2019 - Montreal, Canada
Duration: 7 Jul 201911 Jul 2019

Conference

Conference26th International Congress on Sound and Vibration 2019
Abbreviated titleICSV 2019
CountryCanada
CityMontreal
Period7/07/1911/07/19

Fingerprint

rails
stiffness
soils
high speed
vibration
ground tracks
costs
critical velocity
causes
dynamic response
safety

Keywords

  • Railway vibration
  • Soil stiffening
  • Thin-layer element method

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Dong, K., Laghrouche, O., Connolly, D. P., Woodward, P. K., & Costa, P. A. (2019). Optimising soil stiffness on high speed rail lines to prevent vibration. In Proceedings of the 26th International Congress on Sound and Vibration Canadian Acoustical Association.
Dong, Kaitai ; Laghrouche, Omar ; Connolly, David P. ; Woodward, Peter K. ; Costa, Pedro Alves. / Optimising soil stiffness on high speed rail lines to prevent vibration. Proceedings of the 26th International Congress on Sound and Vibration. Canadian Acoustical Association, 2019.
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Dong, K, Laghrouche, O, Connolly, DP, Woodward, PK & Costa, PA 2019, Optimising soil stiffness on high speed rail lines to prevent vibration. in Proceedings of the 26th International Congress on Sound and Vibration. Canadian Acoustical Association, 26th International Congress on Sound and Vibration 2019, Montreal, Canada, 7/07/19.

Optimising soil stiffness on high speed rail lines to prevent vibration. / Dong, Kaitai; Laghrouche, Omar; Connolly, David P.; Woodward, Peter K.; Costa, Pedro Alves.

Proceedings of the 26th International Congress on Sound and Vibration. Canadian Acoustical Association, 2019.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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AB - The fast movement associated with high speed trains can cause significant dynamic effects within the supporting railway track structure. The speed at which maximum dynamic response occurs is known as the 'critical velocity' and is undesirable because large rail vibrations are generated when travelling close to it. These vibrations can cause a safety concern, and also propagate to the free-field where they disturb nearby buildings. A method to minimise these vibrations is to stiffen the soil directly below the track either via soil replacement or soil improvement, however both options are expensive. Their cost can be reduced though if either the depth or stiffness magnitude of the replacement is optimised. Therefore this work develops a track-ground model using the thin-layer method, which is capable of assessing the effect of different combinations of soil improvement on track vibration levels. It is shown that if improvement is carefully designed, performance can be maximised for minimum cost. Similarly, if improvement is poorly chosen, it can result in marginal improvement, and in some cases even amplify track vibration

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Dong K, Laghrouche O, Connolly DP, Woodward PK, Costa PA. Optimising soil stiffness on high speed rail lines to prevent vibration. In Proceedings of the 26th International Congress on Sound and Vibration. Canadian Acoustical Association. 2019