Influence of suction history on hydraulic and stress-strain behavior of unsaturated soils

Sun, D; Zhang, J; Gao, Y; Sheng, D

Influence of suction history on hydraulic and stress-strain behavior of unsaturated soils

Sun, D Zhang, J Gao, Y Sheng, D

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Publisher:: ASCE-AMER SOC CIVIL ENGINEERS
Publication Type:: Journal Article
Citation:: International Journal of Geomechanics, 2016, 16, (6)
Issue Date:: 2016-12-01

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Field	Value	Language
dc.contributor.author	Sun, D
dc.contributor.author	Zhang, J
dc.contributor.author	Gao, Y
dc.contributor.author	Sheng, D https://orcid.org/0000-0002-1665-6931
dc.date.accessioned	2022-08-11T04:45:41Z
dc.date.available	2022-08-11T04:45:41Z
dc.date.issued	2016-12-01
dc.identifier.citation	International Journal of Geomechanics, 2016, 16, (6)
dc.identifier.issn	1532-3641
dc.identifier.issn	1943-5622
dc.identifier.uri	http://hdl.handle.net/10453/159930
dc.description.abstract	An experimental study was performed to investigate the effects of suction history on the hydraulic and stress-strain behavior of unsaturated soils. Test results show that, even if the same path of net stress and suction was followed during triaxial shearing, the stress-strain and strength behavior are different between specimens experiencing different suction histories. When the maximum suction experienced in the past was less than the residual suction, the specimen that experienced higher past suction produced higher shear strength. This is because the specimen was subjected to a higher suction, i.e., a higher average skeleton stress, and thus became overconsolidated. In contrast, when the maximum suction experienced in the past was higher than the residual suction, the specimen that experienced higher past suction produced lower shear strength. This is because, in this particular case, the high suction induced structural damage in the specimen, which impacts the stress-strain behavior during subsequent shearing. High suction greater than the residual suction was applied using the vapor equilibrium method by putting the soil sample in a glass desiccator with saturated salt solution. The wide suction history effects should be taken into account in constitutive modeling of unsaturated soils.
dc.language	English
dc.publisher	ASCE-AMER SOC CIVIL ENGINEERS
dc.relation.ispartof	International Journal of Geomechanics
dc.relation.isbasedon	10.1061/(ASCE)GM.1943-5622.0000602
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0914 Resources Engineering and Extractive Metallurgy
dc.subject.classification	General Mathematics
dc.title	Influence of suction history on hydraulic and stress-strain behavior of unsaturated soils
dc.type	Journal Article
utslib.citation.volume	16
utslib.for	0905 Civil Engineering
utslib.for	0914 Resources Engineering and Extractive Metallurgy
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	2022-08-11T04:45:40Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	16
utslib.citation.issue	6

Abstract:

An experimental study was performed to investigate the effects of suction history on the hydraulic and stress-strain behavior of unsaturated soils. Test results show that, even if the same path of net stress and suction was followed during triaxial shearing, the stress-strain and strength behavior are different between specimens experiencing different suction histories. When the maximum suction experienced in the past was less than the residual suction, the specimen that experienced higher past suction produced higher shear strength. This is because the specimen was subjected to a higher suction, i.e., a higher average skeleton stress, and thus became overconsolidated. In contrast, when the maximum suction experienced in the past was higher than the residual suction, the specimen that experienced higher past suction produced lower shear strength. This is because, in this particular case, the high suction induced structural damage in the specimen, which impacts the stress-strain behavior during subsequent shearing. High suction greater than the residual suction was applied using the vapor equilibrium method by putting the soil sample in a glass desiccator with saturated salt solution. The wide suction history effects should be taken into account in constitutive modeling of unsaturated soils.

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http://hdl.handle.net/10453/159930