The effect of ballast moisture content and fouling index on railway track settlement

A primary function of railway ballast is to maintain vertical track geometry, however over time it becomes contaminated with fines which reduce its ability to free-drain. Then, in the presence of moisture, the individual particles have greater scope for rearrangement thus leading to increased track...

Descripción completa

Detalles Bibliográficos
Autores: Charoenwong, Chonlatis, Connolly, David P., Alves Costa, Pedro, Galvín, Pedro, Romero Ordóñez, Antonio
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:España
Institución:Universidad de Sevilla (US)
Repositorio:idUS. Depósito de Investigación de la Universidad de Sevilla
OAI Identifier:oai:idus.us.es:11441/155386
Acceso en línea:https://hdl.handle.net/11441/155386
https://doi.org/10.1016/j.trgeo.2024.101193
Access Level:acceso abierto
Palabra clave:Railway ballast fouling index
Moisture content of fines
Differential track settlement
Railway track geometry
Climate change
Earthwork stiffness
id ES_09e7cc2c08fe6051d8ceb3e858b5ff4e
oai_identifier_str oai:idus.us.es:11441/155386
network_acronym_str ES
network_name_str España
repository_id_str
spelling The effect of ballast moisture content and fouling index on railway track settlementCharoenwong, ChonlatisConnolly, David P.Alves Costa, PedroGalvín, PedroRomero Ordóñez, AntonioRailway ballast fouling indexMoisture content of finesDifferential track settlementRailway track geometryClimate changeEarthwork stiffnessA primary function of railway ballast is to maintain vertical track geometry, however over time it becomes contaminated with fines which reduce its ability to free-drain. Then, in the presence of moisture, the individual particles have greater scope for rearrangement thus leading to increased track settlement. This behaviour has received limited studied from a differential settlement viewpoint despite track geometry being the dominant metric used for scheduling railway maintenance. Therefore this paper presents a novel numerical modelling approach capable of simulating the effect of ballast fouling and moisture content on the evolution of track geometry. First the model is presented, which uses a 2.5D finite element approach with perfectly matched layers to simulate static and dynamic stress fields from trains. Non-linear track-soil effects are considered and loading is applied using a multi-body vehicle with train-track coupling. Differential track settlement is calculated in an iterative manner, being updated after every train passage. It is used to perform four analyses, the first of which is to investigate the effect of ballast fouling considering dry conditions. Next the effect of moisture of fines is studied. Then, the effect of earthwork stiffness and train speed is analysed. It is shown that elevated levels of ballast fouling lead to faster deterioration in track geometry, particularly in the presence of moisture. When the ballast is heavily fouled and the moisture of fines is high, rapid deterioration occurs. In contrast, when the ballast is kept dry, the increase in degradation rate for fouled ballast is limited. Higher train speeds and lower earthwork stiffness’s make this effect more pronounced.ElsevierMecánica de Medios Continuos y Teoría de EstructurasTEP245: Ingeniería de las EstructurasLeverhulme PLP-2016-2702024info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttps://hdl.handle.net/11441/155386https://doi.org/10.1016/j.trgeo.2024.101193reponame:idUS. Depósito de Investigación de la Universidad de Sevillainstname:Universidad de Sevilla (US)InglésTransportation Geotechnics, 45 (101193).PLP-2016-270https://www.sciencedirect.com/science/article/pii/S221439122400014Xinfo:eu-repo/semantics/openAccessoai:idus.us.es:11441/1553862026-06-17T12:51:07Z
dc.title.none.fl_str_mv The effect of ballast moisture content and fouling index on railway track settlement
title The effect of ballast moisture content and fouling index on railway track settlement
spellingShingle The effect of ballast moisture content and fouling index on railway track settlement
Charoenwong, Chonlatis
Railway ballast fouling index
Moisture content of fines
Differential track settlement
Railway track geometry
Climate change
Earthwork stiffness
title_short The effect of ballast moisture content and fouling index on railway track settlement
title_full The effect of ballast moisture content and fouling index on railway track settlement
title_fullStr The effect of ballast moisture content and fouling index on railway track settlement
title_full_unstemmed The effect of ballast moisture content and fouling index on railway track settlement
title_sort The effect of ballast moisture content and fouling index on railway track settlement
dc.creator.none.fl_str_mv Charoenwong, Chonlatis
Connolly, David P.
Alves Costa, Pedro
Galvín, Pedro
Romero Ordóñez, Antonio
author Charoenwong, Chonlatis
author_facet Charoenwong, Chonlatis
Connolly, David P.
Alves Costa, Pedro
Galvín, Pedro
Romero Ordóñez, Antonio
author_role author
author2 Connolly, David P.
Alves Costa, Pedro
Galvín, Pedro
Romero Ordóñez, Antonio
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Mecánica de Medios Continuos y Teoría de Estructuras
TEP245: Ingeniería de las Estructuras
Leverhulme PLP-2016-270
dc.subject.none.fl_str_mv Railway ballast fouling index
Moisture content of fines
Differential track settlement
Railway track geometry
Climate change
Earthwork stiffness
topic Railway ballast fouling index
Moisture content of fines
Differential track settlement
Railway track geometry
Climate change
Earthwork stiffness
description A primary function of railway ballast is to maintain vertical track geometry, however over time it becomes contaminated with fines which reduce its ability to free-drain. Then, in the presence of moisture, the individual particles have greater scope for rearrangement thus leading to increased track settlement. This behaviour has received limited studied from a differential settlement viewpoint despite track geometry being the dominant metric used for scheduling railway maintenance. Therefore this paper presents a novel numerical modelling approach capable of simulating the effect of ballast fouling and moisture content on the evolution of track geometry. First the model is presented, which uses a 2.5D finite element approach with perfectly matched layers to simulate static and dynamic stress fields from trains. Non-linear track-soil effects are considered and loading is applied using a multi-body vehicle with train-track coupling. Differential track settlement is calculated in an iterative manner, being updated after every train passage. It is used to perform four analyses, the first of which is to investigate the effect of ballast fouling considering dry conditions. Next the effect of moisture of fines is studied. Then, the effect of earthwork stiffness and train speed is analysed. It is shown that elevated levels of ballast fouling lead to faster deterioration in track geometry, particularly in the presence of moisture. When the ballast is heavily fouled and the moisture of fines is high, rapid deterioration occurs. In contrast, when the ballast is kept dry, the increase in degradation rate for fouled ballast is limited. Higher train speeds and lower earthwork stiffness’s make this effect more pronounced.
publishDate 2024
dc.date.none.fl_str_mv 2024
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://hdl.handle.net/11441/155386
https://doi.org/10.1016/j.trgeo.2024.101193
url https://hdl.handle.net/11441/155386
https://doi.org/10.1016/j.trgeo.2024.101193
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Transportation Geotechnics, 45 (101193).
PLP-2016-270
https://www.sciencedirect.com/science/article/pii/S221439122400014X
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:idUS. Depósito de Investigación de la Universidad de Sevilla
instname:Universidad de Sevilla (US)
instname_str Universidad de Sevilla (US)
reponame_str idUS. Depósito de Investigación de la Universidad de Sevilla
collection idUS. Depósito de Investigación de la Universidad de Sevilla
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869403133194534912
score 15.812429

Similares en LA Referencia