Shear behaviour of subgrade soil with reference to varying initial shear stress and plasticity index

Silva, IN; Indraratna, B; Nguyen, TT; Rujikiatkamjorn, C

Shear behaviour of subgrade soil with reference to varying initial shear stress and plasticity index

Silva, IN Indraratna, B

Nguyen, TT Rujikiatkamjorn, C

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Publisher:: Springer Science and Business Media LLC
Publication Type:: Journal Article
Citation:: Acta Geotechnica

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Field	Value	Language
dc.contributor.author	Silva, IN
dc.contributor.author	Indraratna, B https://orcid.org/0000-0002-9057-1514
dc.contributor.author	Nguyen, TT
dc.contributor.author	Rujikiatkamjorn, C https://orcid.org/0000-0001-8625-2839
dc.date.accessioned	2022-02-14T23:44:23Z
dc.date.available	2022-02-14T23:44:23Z
dc.identifier.citation	Acta Geotechnica
dc.identifier.issn	1861-1125
dc.identifier.issn	1861-1133
dc.identifier.uri	http://hdl.handle.net/10453/154512
dc.description.abstract	<jats:title>Abstract</jats:title><jats:p>The influence of stress anisotropy (<jats:italic>K</jats:italic>) (i.e. the ratio between effective horizontal and vertical stresses) on the shear behaviour of soils has received significant attention in past studies, but how its influence depends on different values of the plasticity index (PI) has not been properly quantified. In this study, the results of a series of undrained triaxial tests on anisotropically consolidated soil at different values of <jats:italic>K</jats:italic> are reported<jats:italic>,</jats:italic> and together with past experimental data, the interactive roles of <jats:italic>K</jats:italic> and PI on the shear behaviour of soil are rigorously interpreted. The findings indicate that the peak shear strength increases with higher brittleness, whereas the peak excess pore pressure diminishes when the value of <jats:italic>K</jats:italic> decreases. Moreover, increasing the value of PI up to 35 tends to increase the peak shear strength, but beyond that the influence of PI seems marginal. Based on the findings of this study, empirical equations incorporating PI and <jats:italic>K</jats:italic> to estimate the undrained shear strength are proposed with acceptable accuracy.</jats:p>
dc.language	en
dc.publisher	Springer Science and Business Media LLC
dc.relation	http://purl.org/au-research/grants/arc/LP160101254
dc.relation.ispartof	Acta Geotechnica
dc.relation.isbasedon	10.1007/s11440-022-01477-w
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0905 Civil Engineering
dc.subject.classification	Geological & Geomatics Engineering
dc.title	Shear behaviour of subgrade soil with reference to varying initial shear stress and plasticity index
dc.type	Journal Article
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	open_access	*
dc.date.updated	2022-02-14T23:44:12Z
pubs.publication-status	Published online

Abstract:

AbstractThe influence of stress anisotropy (K) (i.e. the ratio between effective horizontal and vertical stresses) on the shear behaviour of soils has received significant attention in past studies, but how its influence depends on different values of the plasticity index (PI) has not been properly quantified. In this study, the results of a series of undrained triaxial tests on anisotropically consolidated soil at different values of K are reported, and together with past experimental data, the interactive roles of K and PI on the shear behaviour of soil are rigorously interpreted. The findings indicate that the peak shear strength increases with higher brittleness, whereas the peak excess pore pressure diminishes when the value of K decreases. Moreover, increasing the value of PI up to 35 tends to increase the peak shear strength, but beyond that the influence of PI seems marginal. Based on the findings of this study, empirical equations incorporating PI and K to estimate the undrained shear strength are proposed with acceptable accuracy.

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http://hdl.handle.net/10453/154512