Field study of pile – prefabricated vertical drain (PVD) interaction in soft clay

Zhu, D; Indraratna, B; Poulos, H; Rujikiatkamjorn, C

Field study of pile – prefabricated vertical drain (PVD) interaction in soft clay

Zhu, D Indraratna, B

Poulos, H Rujikiatkamjorn, C

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Publisher:: CANADIAN SCIENCE PUBLISHING
Publication Type:: Journal Article
Citation:: Canadian Geotechnical Journal, 2020, 57, (3), pp. 377-390
Issue Date:: 2020-01-01

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Field	Value	Language
dc.contributor.author	Zhu, D
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Poulos, H
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.date.accessioned	2021-01-07T02:34:03Z
dc.date.available	2021-01-07T02:34:03Z
dc.date.issued	2020-01-01
dc.identifier.citation	Canadian Geotechnical Journal, 2020, 57, (3), pp. 377-390
dc.identifier.issn	0008-3674
dc.identifier.issn	1208-6010
dc.identifier.uri	http://hdl.handle.net/10453/145153
dc.description.abstract	© 2020, Canadian Science Publishing. All rights reserved. Piles and prefabricated vertical drains (PVDs) are two well-established inclusions used by geotechnical practitioners when dealing with soft compressible foundations. Induced movements in highly compressible soil can adversely influence the pile response by inducing additional movements and stresses in the piles. Especially, undesirable soil–pile interaction often leads to the development of excess pore-water pressure during pile installation and negative skin friction caused by the settlement of compressible soil surrounding the piles. Additional drainage by PVDs prior to the installation of a pile could reduce excess pore-water pressure, lateral soil movement, and negative skin friction on the pile. In this paper, full-scale field testing on two trial embankments built on soft soil is reported and the relative behaviour of these two embankments is compared and discussed. Soft soil underneath both embankments was consolidated before one pile was installed at the centre of each embankment. The pore-water pressure, lateral soil movement, surface settlement, and associated strain at the pile shaft were recorded. The pile capacity was tested immediately and 3 h after pile installation. The monitoring and testing results indicated that preconsolidation with PVDs before piling can effectively reduce the excess pore-water pressure, lateral soil movement, and downdrag on the pile.
dc.language	English
dc.publisher	CANADIAN SCIENCE PUBLISHING
dc.relation.ispartof	Canadian Geotechnical Journal
dc.relation.isbasedon	10.1139/cgj-2018-0873
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Field study of pile – prefabricated vertical drain (PVD) interaction in soft clay
dc.type	Journal Article
utslib.citation.volume	57
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
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
utslib.copyright.status	closed_access	*
dc.date.updated	2021-01-07T02:33:52Z
pubs.issue	3
pubs.publication-status	Published
pubs.volume	57
utslib.citation.issue	3

Abstract:

© 2020, Canadian Science Publishing. All rights reserved. Piles and prefabricated vertical drains (PVDs) are two well-established inclusions used by geotechnical practitioners when dealing with soft compressible foundations. Induced movements in highly compressible soil can adversely influence the pile response by inducing additional movements and stresses in the piles. Especially, undesirable soil–pile interaction often leads to the development of excess pore-water pressure during pile installation and negative skin friction caused by the settlement of compressible soil surrounding the piles. Additional drainage by PVDs prior to the installation of a pile could reduce excess pore-water pressure, lateral soil movement, and negative skin friction on the pile. In this paper, full-scale field testing on two trial embankments built on soft soil is reported and the relative behaviour of these two embankments is compared and discussed. Soft soil underneath both embankments was consolidated before one pile was installed at the centre of each embankment. The pore-water pressure, lateral soil movement, surface settlement, and associated strain at the pile shaft were recorded. The pile capacity was tested immediately and 3 h after pile installation. The monitoring and testing results indicated that preconsolidation with PVDs before piling can effectively reduce the excess pore-water pressure, lateral soil movement, and downdrag on the pile.

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http://hdl.handle.net/10453/145153