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Behaviour of under-track crossings on ballasted railways

Behaviour of under-track crossings on ballasted railways
Behaviour of under-track crossings on ballasted railways
Signal and telecommunications (S&T) cables and other services often cross underneath a railway line in a duct or conduit, buried in the ground below the ballast. These under track crossings (UTX) are likely to increase or decrease the track support stiffness compared with the surrounding ground, depending on the material and construction detail of the crossing. This change in support stiffness will give rise to variations in the dynamic loads exerted by moving trains, with the potential to cause track damage. This paper presents measurements of track deflections at two sites associated with different forms of UTX. The data are then used in finite element based vehicle-track interaction analyses to assess the effects of UTX type and construction on track geometry and performance. The results show that poor performance observed at these sites cannot be explained by the difference in support stiffness alone, but follows the development of gaps or voids between the sleeper base and the ballast.
2214-3912
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Le Pen, Louis
4a38e256-d113-4bba-b0d4-32d41995928a
Milne, David
6b321a45-c19a-4243-b562-517a69e5affc
Watson, Geoff
a7b86a0a-9a2c-44d2-99ed-a6c02b2a356d
Harkness, John
026f02e8-41d9-403f-83be-0d880058ecf1
Powrie, William
600c3f02-00f8-4486-ae4b-b4fc8ec77c3c
Le Pen, Louis
4a38e256-d113-4bba-b0d4-32d41995928a
Milne, David
6b321a45-c19a-4243-b562-517a69e5affc
Watson, Geoff
a7b86a0a-9a2c-44d2-99ed-a6c02b2a356d
Harkness, John
026f02e8-41d9-403f-83be-0d880058ecf1

Powrie, William, Le Pen, Louis, Milne, David, Watson, Geoff and Harkness, John (2019) Behaviour of under-track crossings on ballasted railways. Transportation Geotechnics, 21, [100258]. (doi:10.1016/j.trgeo.2019.100258).

Record type: Article

Abstract

Signal and telecommunications (S&T) cables and other services often cross underneath a railway line in a duct or conduit, buried in the ground below the ballast. These under track crossings (UTX) are likely to increase or decrease the track support stiffness compared with the surrounding ground, depending on the material and construction detail of the crossing. This change in support stiffness will give rise to variations in the dynamic loads exerted by moving trains, with the potential to cause track damage. This paper presents measurements of track deflections at two sites associated with different forms of UTX. The data are then used in finite element based vehicle-track interaction analyses to assess the effects of UTX type and construction on track geometry and performance. The results show that poor performance observed at these sites cannot be explained by the difference in support stiffness alone, but follows the development of gaps or voids between the sleeper base and the ballast.

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1-s2.0-S2214391219301023-main - Accepted Manuscript
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Accepted/In Press date: 2 July 2019
e-pub ahead of print date: 16 July 2019
Published date: December 2019

Identifiers

Local EPrints ID: 432944
URI: http://eprints.soton.ac.uk/id/eprint/432944
ISSN: 2214-3912
PURE UUID: 4d2f443e-4927-4dca-9794-861305305b08
ORCID for William Powrie: ORCID iD orcid.org/0000-0002-2271-0826
ORCID for Louis Le Pen: ORCID iD orcid.org/0000-0002-4362-3895
ORCID for David Milne: ORCID iD orcid.org/0000-0001-6702-3918
ORCID for Geoff Watson: ORCID iD orcid.org/0000-0003-3074-5196
ORCID for John Harkness: ORCID iD orcid.org/0000-0001-7598-0080

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Date deposited: 01 Aug 2019 16:30
Last modified: 07 Oct 2020 04:50

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