Effectiveness of Geosynthetics at Preventing Subgrade Instability under Cyclic Loading

Arivalagan, J; Rujikiatkamjorn, C; Indraratna, B; Warwick, A

Effectiveness of Geosynthetics at Preventing Subgrade Instability under Cyclic Loading

Arivalagan, J Rujikiatkamjorn, C

Indraratna, B

Warwick, A

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Publisher:: American Society of Civil Engineers (ASCE)
Publication Type:: Conference Proceeding
Citation:: Geotechnical Special Publication, 2023, 2023-March, (GSP 341), pp. 427-437
Issue Date:: 2023-01-01

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Field	Value	Language
dc.contributor.author	Arivalagan, J
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-2346-8250
dc.contributor.author	Warwick, A
dc.date.accessioned	2023-05-05T04:48:48Z
dc.date.available	2023-05-05T04:48:48Z
dc.date.issued	2023-01-01
dc.identifier.citation	Geotechnical Special Publication, 2023, 2023-March, (GSP 341), pp. 427-437
dc.identifier.issn	0895-0563
dc.identifier.uri	http://hdl.handle.net/10453/170223
dc.description.abstract	Recent laboratory investigations indicate that low-to-medium plasticity subgrade is vulnerable to subgrade fluidisation due to excessive local hydraulic gradients that develop under cyclic loading. This study primarily investigates the role of geosynthetics to dissipate accumulated excess pore water pressure (EPWP), and minimise particle migration and subgrade fluidisation in typical railway track environments using the dynamic filtration apparatus (DFA). The experiments indicate there is an upward migration of moisture and fine particles towards the ballast-subgrade interface which cause the soil specimen to soften (slurry) under undrained cyclic tests. The combined prefabricated vertical drains (PVDs) and geocomposite system can dissipate the rapid accumulation of EPWPs due to the reduction in drainage path lengths and additional confinement at the ballast and subgrade interface. The excess pore pressure gradients (EPPG) that developed at different depths of the soil specimens were measured to assess the potential for the upward migration of fine particles.
dc.language	en
dc.publisher	American Society of Civil Engineers (ASCE)
dc.relation.ispartof	Geotechnical Special Publication
dc.relation.ispartof	Geo-Congress 2023
dc.relation.isbasedon	10.1061/9780784484685.043
dc.rights	info:eu-repo/semantics/openAccess
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Effectiveness of Geosynthetics at Preventing Subgrade Instability under Cyclic Loading
dc.type	Conference Proceeding
utslib.citation.volume	2023-March
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	open_access	*
dc.date.updated	2023-05-05T04:48:47Z
pubs.issue	GSP 341
pubs.publication-status	Published
pubs.volume	2023-March
utslib.citation.issue	GSP 341

Abstract:

Recent laboratory investigations indicate that low-to-medium plasticity subgrade is vulnerable to subgrade fluidisation due to excessive local hydraulic gradients that develop under cyclic loading. This study primarily investigates the role of geosynthetics to dissipate accumulated excess pore water pressure (EPWP), and minimise particle migration and subgrade fluidisation in typical railway track environments using the dynamic filtration apparatus (DFA). The experiments indicate there is an upward migration of moisture and fine particles towards the ballast-subgrade interface which cause the soil specimen to soften (slurry) under undrained cyclic tests. The combined prefabricated vertical drains (PVDs) and geocomposite system can dissipate the rapid accumulation of EPWPs due to the reduction in drainage path lengths and additional confinement at the ballast and subgrade interface. The excess pore pressure gradients (EPPG) that developed at different depths of the soil specimens were measured to assess the potential for the upward migration of fine particles.

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http://hdl.handle.net/10453/170223