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Article: Mechanical response of a medium-fine-grained decomposed granite in Hong Kong

TitleMechanical response of a medium-fine-grained decomposed granite in Hong Kong
Authors
KeywordsAnisotropy
Critical state
Dilatancy
Membrane penetration
Residual soils
Issue Date2012
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/enggeo
Citation
Engineering Geology, 2012, v. 129-130, p. 1-8 How to Cite?
AbstractCompletely decomposed granite (CDG) is abundant in Hong Kong. It has been used extensively as fill materials in various applications, such as back-filling materials for retaining structures and pavements. In this paper, results of a series of triaxial tests, including isotropic and anisotropic compression, and drained and undrained shearing tests, on a medium-fine-grained re-compacted CDG with overconsolidation ratio ranged between 1 and 8 are reported. The tests aim to understand the mechanical behavior of the soil in its saturated state under various initial states, stress paths and drainage conditions. It is found that the material is highly compressible during virgin isotropic and anisotropic compression. Moreover, the virgin compression lines are uniquely associated with their stress ratios and they appear to parallel to each other in an e-ln. p' plane. All specimens exhibit strain-hardening type response during drained shearing. In undrained shear, normally consolidated specimens reveal contractive response until the ultimate states are reached. Overconsolidated specimens, however, show complex stress paths and volumetric tendency. Dilatancy responses of the soil during a constant stress ratio compression and deviatoric shear are discussed respectively. Unique isotropic compression line (ICL) and critical state line (CSL) are reported for the studied soil. © 2012 Elsevier B.V..
Persistent Identifierhttp://hdl.handle.net/10722/148834
ISSN
2015 Impact Factor: 2.196
2015 SCImago Journal Rankings: 1.810
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYan, WM-
dc.contributor.authorLi, XS-
dc.date.accessioned2012-06-08T03:15:58Z-
dc.date.available2012-06-08T03:15:58Z-
dc.date.issued2012-
dc.identifier.citationEngineering Geology, 2012, v. 129-130, p. 1-8-
dc.identifier.issn0013-7952-
dc.identifier.urihttp://hdl.handle.net/10722/148834-
dc.description.abstractCompletely decomposed granite (CDG) is abundant in Hong Kong. It has been used extensively as fill materials in various applications, such as back-filling materials for retaining structures and pavements. In this paper, results of a series of triaxial tests, including isotropic and anisotropic compression, and drained and undrained shearing tests, on a medium-fine-grained re-compacted CDG with overconsolidation ratio ranged between 1 and 8 are reported. The tests aim to understand the mechanical behavior of the soil in its saturated state under various initial states, stress paths and drainage conditions. It is found that the material is highly compressible during virgin isotropic and anisotropic compression. Moreover, the virgin compression lines are uniquely associated with their stress ratios and they appear to parallel to each other in an e-ln. p' plane. All specimens exhibit strain-hardening type response during drained shearing. In undrained shear, normally consolidated specimens reveal contractive response until the ultimate states are reached. Overconsolidated specimens, however, show complex stress paths and volumetric tendency. Dilatancy responses of the soil during a constant stress ratio compression and deviatoric shear are discussed respectively. Unique isotropic compression line (ICL) and critical state line (CSL) are reported for the studied soil. © 2012 Elsevier B.V..-
dc.languageeng-
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/enggeo-
dc.relation.ispartofEngineering Geology-
dc.subjectAnisotropy-
dc.subjectCritical state-
dc.subjectDilatancy-
dc.subjectMembrane penetration-
dc.subjectResidual soils-
dc.titleMechanical response of a medium-fine-grained decomposed granite in Hong Kongen_US
dc.typeArticleen_US
dc.identifier.emailYan, WM: ryanyan@hku.hk-
dc.identifier.emailLi, XS: xsli@ust.hk-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.enggeo.2011.12.013-
dc.identifier.scopuseid_2-s2.0-84862815487-
dc.identifier.hkuros199905-
dc.identifier.volume129-130-
dc.identifier.spage1-
dc.identifier.epage8-
dc.identifier.isiWOS:000302593500001-
dc.publisher.placeNetherlands-
dc.identifier.citeulike10236415-

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