Stabilisation of Stiffer Rail Track Substructure Using Artificial Inclusion

Navaratnarajah, SK; Indraratna, B

Stabilisation of Stiffer Rail Track Substructure Using Artificial Inclusion

Navaratnarajah, SK Indraratna, B

Permalink

Publisher:: Springer Science and Business Media LLC
Publication Type:: Journal Article
Citation:: Indian Geotechnical Journal, 2020, 50, (2), pp. 196-203
Issue Date:: 2020-04-01

Closed Access

	Filename	Description	Size
	Navaratnarajah-Indraratna2020_Article_StabilisationOfStifferRailTrac.pdf		2.78 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Navaratnarajah, SK
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.date.accessioned	2021-03-11T01:42:37Z
dc.date.available	2021-03-11T01:42:37Z
dc.date.issued	2020-04-01
dc.identifier.citation	Indian Geotechnical Journal, 2020, 50, (2), pp. 196-203
dc.identifier.issn	0971-9555
dc.identifier.issn	2277-3347
dc.identifier.uri	http://hdl.handle.net/10453/147027
dc.description.abstract	© 2020, Indian Geotechnical Society. The railway transport system in many countries plays a significant role in the passage of bulk freight and passengers. However, increased train speeds and higher freight loads (large dynamic wheel loads) accelerate the deterioration of rail track substructure. This problem is more critical in isolated rail track locations where the track substructure is much stiffer than the regular surface track assembly such as track at the bridges and tunnels. Ballast is a key track foundation material placed underneath the sleepers which provides structural support against high cyclic and impact stresses caused by moving trains. Inclusion of rubber mats called under ballast mats (UBMs) placed between the ballast and stiffer base layer is one of the measures to minimise the ballast deterioration. In this study, cyclic loads representing fast and heavy haul trains were simulated on stiffer track foundation condition using a large-scale process simulation prismoidal triaxial apparatus to investigate the mitigation of strain, stress and degradation characteristics of ballast stabilised with UBM. These UBMs were locally manufactured from recycled tyre wastes. The results show that ballast on a stiff foundation substructure stabilised with UBM experienced significantly less vertical and lateral deformation, ballast interface and inter-particle stresses and degradation. This study also confirmed that the recycled tyre UBMs used in this study had adequate damping to absorb the energy transmitted to the moving train to the track, thus preventing excessive plastic deformation and degradation of the ballast layer.
dc.language	en
dc.publisher	Springer Science and Business Media LLC
dc.relation.ispartof	Indian Geotechnical Journal
dc.relation.isbasedon	10.1007/s40098-019-00406-1
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering
dc.title	Stabilisation of Stiffer Rail Track Substructure Using Artificial Inclusion
dc.type	Journal Article
utslib.citation.volume	50
utslib.for	0905 Civil Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2021-03-11T01:42:35Z
pubs.issue	2
pubs.publication-status	Published
pubs.volume	50
utslib.citation.issue	2

Abstract:

© 2020, Indian Geotechnical Society. The railway transport system in many countries plays a significant role in the passage of bulk freight and passengers. However, increased train speeds and higher freight loads (large dynamic wheel loads) accelerate the deterioration of rail track substructure. This problem is more critical in isolated rail track locations where the track substructure is much stiffer than the regular surface track assembly such as track at the bridges and tunnels. Ballast is a key track foundation material placed underneath the sleepers which provides structural support against high cyclic and impact stresses caused by moving trains. Inclusion of rubber mats called under ballast mats (UBMs) placed between the ballast and stiffer base layer is one of the measures to minimise the ballast deterioration. In this study, cyclic loads representing fast and heavy haul trains were simulated on stiffer track foundation condition using a large-scale process simulation prismoidal triaxial apparatus to investigate the mitigation of strain, stress and degradation characteristics of ballast stabilised with UBM. These UBMs were locally manufactured from recycled tyre wastes. The results show that ballast on a stiff foundation substructure stabilised with UBM experienced significantly less vertical and lateral deformation, ballast interface and inter-particle stresses and degradation. This study also confirmed that the recycled tyre UBMs used in this study had adequate damping to absorb the energy transmitted to the moving train to the track, thus preventing excessive plastic deformation and degradation of the ballast layer.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/147027