Laboratory investigation of the seepage induced response of granular soils under static and cyclic loading

Israr, J; Indraratna, B; Rujikiatkamjorn, C

Laboratory investigation of the seepage induced response of granular soils under static and cyclic loading

Israr, J Indraratna, B

Rujikiatkamjorn, C

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Publisher:: AMER SOC TESTING MATERIALS
Publication Type:: Journal Article
Citation:: Geotechnical Testing Journal, 2016, 39, (5), pp. 795-812
Issue Date:: 2016-09-01

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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.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.date.accessioned	2022-07-06T20:50:49Z
dc.date.available	2022-07-06T20:50:49Z
dc.date.issued	2016-09-01
dc.identifier.citation	Geotechnical Testing Journal, 2016, 39, (5), pp. 795-812
dc.identifier.issn	0149-6115
dc.identifier.issn	1945-7545
dc.identifier.uri	http://hdl.handle.net/10453/158686
dc.description.abstract	Experimental observations of the seepage induced response of soils under static and cyclic loading are reported. Hydraulic tests were performed using a modified filtration apparatus designed to capture the response of soils subjected to an upward flow. This apparatus could conveniently monitor various factors influencing the onset of seepage induced failures such as spatio-temporal variations in porosity, average and local hydraulic gradients, and the mean effective streb distribution with depth. Under static conditions, heave and heavepiping failures occurred in densely compacted uniform fine-gravels and fine-sands, respectively, and excebive washout (i.e., suffusion) was observed in gap-graded sandygravel soil. Despite this gap-graded soil failing in a similar way under static loading, relatively premature suffusion occurred under cyclic loading that could be attributed to the constant agitation of fines and the development of pore prebure within the pore spaces. The reported results and published data under cyclic loading were compared with various static filtration criteria to abeb their potential instability, and they revealed that none could accurately capture their cyclic filtration response. However, at the onset of instability, a unique hydro-mechanical correlation could be observed between the magnitudes of local hydraulic gradients and effective strebes calculated using a proposed streb reduction model. Nevertheleb, this correlation governing the inception of instability in reported tests established a clear hydro-mechanical boundary with pobible implications for practical filter design under cyclic loading conditions.
dc.language	English
dc.publisher	AMER SOC TESTING MATERIALS
dc.relation.ispartof	Geotechnical Testing Journal
dc.relation.isbasedon	10.1520/GTJ20150288
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Laboratory investigation of the seepage induced response of granular soils under static and cyclic loading
dc.type	Journal Article
utslib.citation.volume	39
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	2022-07-06T20:50:45Z
pubs.issue	5
pubs.publication-status	Published
pubs.volume	39
utslib.citation.issue	5

Abstract:

Experimental observations of the seepage induced response of soils under static and cyclic loading are reported. Hydraulic tests were performed using a modified filtration apparatus designed to capture the response of soils subjected to an upward flow. This apparatus could conveniently monitor various factors influencing the onset of seepage induced failures such as spatio-temporal variations in porosity, average and local hydraulic gradients, and the mean effective streb distribution with depth. Under static conditions, heave and heavepiping failures occurred in densely compacted uniform fine-gravels and fine-sands, respectively, and excebive washout (i.e., suffusion) was observed in gap-graded sandygravel soil. Despite this gap-graded soil failing in a similar way under static loading, relatively premature suffusion occurred under cyclic loading that could be attributed to the constant agitation of fines and the development of pore prebure within the pore spaces. The reported results and published data under cyclic loading were compared with various static filtration criteria to abeb their potential instability, and they revealed that none could accurately capture their cyclic filtration response. However, at the onset of instability, a unique hydro-mechanical correlation could be observed between the magnitudes of local hydraulic gradients and effective strebes calculated using a proposed streb reduction model. Nevertheleb, this correlation governing the inception of instability in reported tests established a clear hydro-mechanical boundary with pobible implications for practical filter design under cyclic loading conditions.

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http://hdl.handle.net/10453/158686