Mechanical response and pore pressure generation in granular filters subjected to uniaxial cyclic loading

Israr, J; Indraratna, B

Mechanical response and pore pressure generation in granular filters subjected to uniaxial cyclic loading

Israr, J Indraratna, B

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Publisher:: CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
Publication Type:: Journal Article
Citation:: Canadian Geotechnical Journal, 2018, 55, (12), pp. 1756-1768
Issue Date:: 2018-01-01

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Field	Value	Language
dc.contributor.author	Israr, J
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.date.accessioned	2022-09-07T21:35:04Z
dc.date.available	2022-09-07T21:35:04Z
dc.date.issued	2018-01-01
dc.identifier.citation	Canadian Geotechnical Journal, 2018, 55, (12), pp. 1756-1768
dc.identifier.issn	0008-3674
dc.identifier.issn	1208-6010
dc.identifier.uri	http://hdl.handle.net/10453/161481
dc.description.abstract	This paper presents results from a series of piping tests carried out on a selected range of granular filters under static and cyclic loading conditions. The mechanical response of filters subjected to cyclic loading could be characterized in three distinct phases; namely, (I) pre-shakedown, (II) post-shakedown, and (III) post-critical (i.e., the occurrence of internal erosion). All the permanent geomechanical changes such, as erosion, permeability variations, and axial strain developments, took place during phases I and III, while the specimen response remained purely elastic during phase II. The post-critical occurrence of erosion incurred significant settlement that may not be tolerable for high-speed railway substructures. The analysis revealed that a cyclic load would induce excess pore-water pressure, which, in corroboration with steady seepage forces and agitation due to dynamic loading, could then cause internal erosion of fines from the specimens. The resulting excess pore pressure is a direct function of the axial strain due to cyclic densification, as well as the loading frequency and reduction in permeability. A model based on strain energy is proposed to quantify the excess pore-water pressure, and subsequently validated using current and existing test results from published studies.
dc.language	English
dc.publisher	CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
dc.relation.ispartof	Canadian Geotechnical Journal
dc.relation.isbasedon	10.1139/cgj-2017-0393
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Mechanical response and pore pressure generation in granular filters subjected to uniaxial cyclic loading
dc.type	Journal Article
utslib.citation.volume	55
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental 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	2022-09-07T21:35:02Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	55
utslib.citation.issue	12

Abstract:

This paper presents results from a series of piping tests carried out on a selected range of granular filters under static and cyclic loading conditions. The mechanical response of filters subjected to cyclic loading could be characterized in three distinct phases; namely, (I) pre-shakedown, (II) post-shakedown, and (III) post-critical (i.e., the occurrence of internal erosion). All the permanent geomechanical changes such, as erosion, permeability variations, and axial strain developments, took place during phases I and III, while the specimen response remained purely elastic during phase II. The post-critical occurrence of erosion incurred significant settlement that may not be tolerable for high-speed railway substructures. The analysis revealed that a cyclic load would induce excess pore-water pressure, which, in corroboration with steady seepage forces and agitation due to dynamic loading, could then cause internal erosion of fines from the specimens. The resulting excess pore pressure is a direct function of the axial strain due to cyclic densification, as well as the loading frequency and reduction in permeability. A model based on strain energy is proposed to quantify the excess pore-water pressure, and subsequently validated using current and existing test results from published studies.

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http://hdl.handle.net/10453/161481