Influence of periodic cyclic loading and rest period on soft clay consolidation

Atapattu, S; Indraratna, B; Rujikiatkamjorn, C

Influence of periodic cyclic loading and rest period on soft clay consolidation

Atapattu, S

Indraratna, B

Rujikiatkamjorn, C

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Publisher:: ICE PUBLISHING
Publication Type:: Journal Article
Citation:: Proceedings of the Institution of Civil Engineers: Ground Improvement, 2023
Issue Date:: 2023-01-01

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Field	Value	Language
dc.contributor.author	Atapattu, S https://orcid.org/0000-0003-1892-7245
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-2346-8250
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.date.accessioned	2023-12-18T09:31:37Z
dc.date.available	2023-12-18T09:31:37Z
dc.date.issued	2023-01-01
dc.identifier.citation	Proceedings of the Institution of Civil Engineers: Ground Improvement, 2023
dc.identifier.issn	1755-0750
dc.identifier.issn	1755-0769
dc.identifier.uri	http://hdl.handle.net/10453/173861
dc.description.abstract	Railways are often subjected to periodic cyclic loading and intermittent rest periods. Excessive consolidation settlements can affect the performance of railway tracks built on the soft subgrade. The consolidation behaviour under railway loading conditions with rest periods has not been evaluated thoroughly. In this study, laboratory testing was conducted to investigate the influence of periodic cyclic loading and rest periods on the consolidation of Holocene soft clay from Ballina NSW. The specimens were subjected to a loading frequency of 1 Hz for 54 h with multiple rest periods. The recorded settlements and excess pore-water pressures (EPWP) during cyclic consolidation were employed to determine the corresponding hydraulic gradient, void ratio, resilient (dynamic) modulus and damping ratio. The settlement and accumulated EPWP can be observed during cyclic loading. In contrast, settlements do not occur within a rest period, despite the rapidly dissipating EPWP at the start of a given rest period. The maximum EPWP and settlements decrease as the number of resting period increases. An analytical model capturing the effect of cyclic loading and rest period is proposed where the unique relationships between the hydraulic gradient and the flow rate are established.
dc.language	English
dc.publisher	ICE PUBLISHING
dc.relation.ispartof	Proceedings of the Institution of Civil Engineers: Ground Improvement
dc.relation.isbasedon	10.1680/jgrim.22.00082
dc.rights	info:eu-repo/semantics/embargoedAccess
dc.subject	0503 Soil Sciences, 0905 Civil Engineering
dc.subject.classification	4005 Civil engineering
dc.title	Influence of periodic cyclic loading and rest period on soft clay consolidation
dc.type	Journal Article
utslib.for	0503 Soil Sciences
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	open_access	*
utslib.copyright.embargo	2024-03-14T00:00:00+1000Z
dc.date.updated	2023-12-18T09:31:36Z
pubs.publication-status	Published

Abstract:

Railways are often subjected to periodic cyclic loading and intermittent rest periods. Excessive consolidation settlements can affect the performance of railway tracks built on the soft subgrade. The consolidation behaviour under railway loading conditions with rest periods has not been evaluated thoroughly. In this study, laboratory testing was conducted to investigate the influence of periodic cyclic loading and rest periods on the consolidation of Holocene soft clay from Ballina NSW. The specimens were subjected to a loading frequency of 1 Hz for 54 h with multiple rest periods. The recorded settlements and excess pore-water pressures (EPWP) during cyclic consolidation were employed to determine the corresponding hydraulic gradient, void ratio, resilient (dynamic) modulus and damping ratio. The settlement and accumulated EPWP can be observed during cyclic loading. In contrast, settlements do not occur within a rest period, despite the rapidly dissipating EPWP at the start of a given rest period. The maximum EPWP and settlements decrease as the number of resting period increases. An analytical model capturing the effect of cyclic loading and rest period is proposed where the unique relationships between the hydraulic gradient and the flow rate are established.

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http://hdl.handle.net/10453/173861