Influence of particle gradation and shape on the performance of stone columns in soft clay

Siahaan, F; Indraratna, B; Ngo, NT; Rujikiatkamjorn, C; Heitor, A

Influence of particle gradation and shape on the performance of stone columns in soft clay

Siahaan, F Indraratna, B

Ngo, NT Rujikiatkamjorn, C

Heitor, A

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Publisher:: AMER SOC TESTING MATERIALS
Publication Type:: Journal Article
Citation:: Geotechnical Testing Journal, 2018, 41, (6), pp. 1076-1091
Issue Date:: 2018-11-01

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Field	Value	Language
dc.contributor.author	Siahaan, F
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Ngo, NT
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.contributor.author	Heitor, A
dc.date.accessioned	2022-07-27T23:24:56Z
dc.date.available	2022-07-27T23:24:56Z
dc.date.issued	2018-11-01
dc.identifier.citation	Geotechnical Testing Journal, 2018, 41, (6), pp. 1076-1091
dc.identifier.issn	0149-6115
dc.identifier.issn	1945-7545
dc.identifier.uri	http://hdl.handle.net/10453/159216
dc.description.abstract	A stone column typically consists of particles whose influence has largely been overlooked in design practice in terms of stress transfer, pattern of deformation, and intrusion of fines (clogging). This article presents an experimental study on the load-deformation behavior of a model stone column installed in soft clay with a particular emphasis on the influence of particle gradation and shape under undrained loading. The results show that particle gradation and shape have a significant influence on the load-deformation behavior and the extent of fines intrusion into the stone columns. Relatively well-graded particle sizes favor the development of higher peak shear stresses accompanied by lateral bulging, whereas more uniform grading results in the development of distinct shear planes and smaller peak shear stresses. Deformed columns were also examined using computed tomography, and the porosity profiles at the end of the test were determined using micrographs. Maximum porosity typically occurred in the zone of extreme lateral deformation, with the results suggesting that the extent of fines intrusion was influenced by particle morphology.
dc.language	English
dc.publisher	AMER SOC TESTING MATERIALS
dc.relation.ispartof	Geotechnical Testing Journal
dc.relation.isbasedon	10.1520/GTJ20160234
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Influence of particle gradation and shape on the performance of stone columns in soft clay
dc.type	Journal Article
utslib.citation.volume	41
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	*
dc.date.updated	2022-07-27T23:24:49Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	41
utslib.citation.issue	6

Abstract:

A stone column typically consists of particles whose influence has largely been overlooked in design practice in terms of stress transfer, pattern of deformation, and intrusion of fines (clogging). This article presents an experimental study on the load-deformation behavior of a model stone column installed in soft clay with a particular emphasis on the influence of particle gradation and shape under undrained loading. The results show that particle gradation and shape have a significant influence on the load-deformation behavior and the extent of fines intrusion into the stone columns. Relatively well-graded particle sizes favor the development of higher peak shear stresses accompanied by lateral bulging, whereas more uniform grading results in the development of distinct shear planes and smaller peak shear stresses. Deformed columns were also examined using computed tomography, and the porosity profiles at the end of the test were determined using micrographs. Maximum porosity typically occurred in the zone of extreme lateral deformation, with the results suggesting that the extent of fines intrusion was influenced by particle morphology.

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http://hdl.handle.net/10453/159216