Cyclic behaviour of stone column reinforced subgrade under partially drained condition

Tai, P; Indraratna, B; Rujikiatkamjorn, C; Chen, R; Li, Z

Cyclic behaviour of stone column reinforced subgrade under partially drained condition

Tai, P Indraratna, B

Rujikiatkamjorn, C

Chen, R Li, Z

Permalink

Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Transportation Geotechnics, 2024, 47
Issue Date:: 2024-07-01

Recently Added

	Filename	Description	Size
	1-s2.0-S2214391224001028-main.pdf	Published version	4.67 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Open Access

This item is new to OPUS and is not currently available.

Full metadata record

Field	Value	Language
dc.contributor.author	Tai, P
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.contributor.author	Chen, R
dc.contributor.author	Li, Z
dc.date.accessioned	2024-09-25T03:46:04Z
dc.date.available	2024-09-25T03:46:04Z
dc.date.issued	2024-07-01
dc.identifier.citation	Transportation Geotechnics, 2024, 47
dc.identifier.issn	2214-3912
dc.identifier.issn	2214-3912
dc.identifier.uri	http://hdl.handle.net/10453/180965
dc.description.abstract	The results of a series of model tests are presented to study the performance of stone column reinforced soft soil subjected to cyclic loading under partially drained condition. The influences of the cyclic stress ratio, confining pressure and multi-stage loading were considered. Variations of axial strain, total stress, and pore water pressure were monitored and analysed. The results demonstrated that stone column could markedly reduce soil settlement under cyclic loading compared to soil untreated or improved with vertical drains. However, a threshold of cyclic stress ratio exists beyond which failure occurs quickly. The results indicated that substantial excess pore pressure was generated and then dissipated in the surrounding soil, while a small negative pore pressure was observed in the column. The stress acting on the column increased as the cyclic stress ratio increased, while the stress on the clay subgrade remained relatively unchanged. The failed models were associated with significant bulging or even bending, whereas the stable ones retained a quasi-cylindrical shape. Moreover, rest periods during multi-stage cyclic loading increased the overall resistance and reduced the peak excess pore pressure, thus the unit cell could withstand a higher cyclic stress ratio. The comparison with undrained tests in the literature implied that the threshold of cyclic stress ratio was independent of the drainage condition. At an early stage of cyclic loading, the partially drained condition clearly reduced the generated pore pressure compared to the case of undrained tests.
dc.language	English
dc.publisher	ELSEVIER
dc.relation	http://purl.org/au-research/grants/arc/LP130100839
dc.relation.ispartof	Transportation Geotechnics
dc.relation.isbasedon	10.1016/j.trgeo.2024.101281
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	4005 Civil engineering
dc.title	Cyclic behaviour of stone column reinforced subgrade under partially drained condition
dc.type	Journal Article
utslib.citation.volume	47
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
pubs.organisational-group	University of Technology Sydney/Strength - TRC - Transport Research Centre
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Transport Research Centre (TRC)
utslib.copyright.status	recently_added	*
dc.date.updated	2024-09-25T03:45:59Z
pubs.publication-status	Published
pubs.volume	47

Abstract:

The results of a series of model tests are presented to study the performance of stone column reinforced soft soil subjected to cyclic loading under partially drained condition. The influences of the cyclic stress ratio, confining pressure and multi-stage loading were considered. Variations of axial strain, total stress, and pore water pressure were monitored and analysed. The results demonstrated that stone column could markedly reduce soil settlement under cyclic loading compared to soil untreated or improved with vertical drains. However, a threshold of cyclic stress ratio exists beyond which failure occurs quickly. The results indicated that substantial excess pore pressure was generated and then dissipated in the surrounding soil, while a small negative pore pressure was observed in the column. The stress acting on the column increased as the cyclic stress ratio increased, while the stress on the clay subgrade remained relatively unchanged. The failed models were associated with significant bulging or even bending, whereas the stable ones retained a quasi-cylindrical shape. Moreover, rest periods during multi-stage cyclic loading increased the overall resistance and reduced the peak excess pore pressure, thus the unit cell could withstand a higher cyclic stress ratio. The comparison with undrained tests in the literature implied that the threshold of cyclic stress ratio was independent of the drainage condition. At an early stage of cyclic loading, the partially drained condition clearly reduced the generated pore pressure compared to the case of undrained tests.

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

http://hdl.handle.net/10453/180965