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 language | English |
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Title of host publication | Proceedings of the 26th International Congress on Sound and Vibration |
Publisher | Canadian Acoustical Association |
ISBN (Electronic) | 9781999181000 |
Publication status | Published - 2019 |
Event | 26th International Congress on Sound and Vibration 2019 - Montreal, Canada Duration: 7 Jul 2019 → 11 Jul 2019 |
Conference
Conference | 26th International Congress on Sound and Vibration 2019 |
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Abbreviated title | ICSV 2019 |
Country/Territory | Canada |
City | Montreal |
Period | 7/07/19 → 11/07/19 |
Keywords
- Railway vibration
- Soil stiffening
- Thin-layer element method
ASJC Scopus subject areas
- Acoustics and Ultrasonics