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Article: Triaxial test of undisturbed completely decomposed granite under CT monitoring

TitleTriaxial test of undisturbed completely decomposed granite under CT monitoring
Authors
KeywordsCompletely decomposed granite
CT
Meso-damage of soil structure
Soil mechanics
Triaxial test
Undisturbed soil
Issue Date2004
Citation
Yanshilixue Yu Gongcheng Xuebao/Chinese Journal Of Rock Mechanics And Engineering, 2004, v. 23 n. 3, p. 365-371 How to Cite?
AbstractThe change and failure are monitored and analyzed of the structures of completely decomposed granite from Hong Kong by CU triaxial tests. The CT scanner and the new triaxial apparatus that can monitor the pore water pressure and control the drainage condition are adopted in the test. The confining pressure of two cylinder specimens is 150 and 300 kPa, respectively. To 4 cross sections of each specimen, scanning is performed at 7 stages, i.e. initial state, after consolidation, and five stages of shearing process. Stress-strain curves and outlook change of specimens after test show that specimen failure is of different features according to different confining pressure and initial structures. Under higher confining pressure, shear failure occurs and under lower confining pressure creep failure occurs. The CT images and CT values are discussed. Five conclusions are gained. (1) The initial structures are extremely inhomogeneous. (2) The pore is compressed and the specimens are densitified after consolidation. (3) The meso-damage is in the form of hole-crack-hole due to the structure of soils and confining pressure. (4) Soil is of a very long plastic strain stage prior to peak value and the crack propagates along the failure plane. (5) Residual strength (creep) stage is steady and lots of hole-failure appear in the soil. In addition, a normal CU triaxial test is performed with one specimen from the same block. The results of CT triaxial tests agree well with those of normal triaxial test.
Persistent Identifierhttp://hdl.handle.net/10722/71643
ISSN
2015 SCImago Journal Rankings: 1.073

 

DC FieldValueLanguage
dc.contributor.authorShang, Yen_HK
dc.contributor.authorWang, Sen_HK
dc.contributor.authorYue, Zen_HK
dc.contributor.authorTham, LGen_HK
dc.contributor.authorZhao, Jen_HK
dc.date.accessioned2010-09-06T06:33:51Z-
dc.date.available2010-09-06T06:33:51Z-
dc.date.issued2004en_HK
dc.identifier.citationYanshilixue Yu Gongcheng Xuebao/Chinese Journal Of Rock Mechanics And Engineering, 2004, v. 23 n. 3, p. 365-371en_HK
dc.identifier.issn1000-6915en_HK
dc.identifier.urihttp://hdl.handle.net/10722/71643-
dc.description.abstractThe change and failure are monitored and analyzed of the structures of completely decomposed granite from Hong Kong by CU triaxial tests. The CT scanner and the new triaxial apparatus that can monitor the pore water pressure and control the drainage condition are adopted in the test. The confining pressure of two cylinder specimens is 150 and 300 kPa, respectively. To 4 cross sections of each specimen, scanning is performed at 7 stages, i.e. initial state, after consolidation, and five stages of shearing process. Stress-strain curves and outlook change of specimens after test show that specimen failure is of different features according to different confining pressure and initial structures. Under higher confining pressure, shear failure occurs and under lower confining pressure creep failure occurs. The CT images and CT values are discussed. Five conclusions are gained. (1) The initial structures are extremely inhomogeneous. (2) The pore is compressed and the specimens are densitified after consolidation. (3) The meso-damage is in the form of hole-crack-hole due to the structure of soils and confining pressure. (4) Soil is of a very long plastic strain stage prior to peak value and the crack propagates along the failure plane. (5) Residual strength (creep) stage is steady and lots of hole-failure appear in the soil. In addition, a normal CU triaxial test is performed with one specimen from the same block. The results of CT triaxial tests agree well with those of normal triaxial test.en_HK
dc.languageengen_HK
dc.relation.ispartofYanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and Engineeringen_HK
dc.subjectCompletely decomposed graniteen_HK
dc.subjectCTen_HK
dc.subjectMeso-damage of soil structureen_HK
dc.subjectSoil mechanicsen_HK
dc.subjectTriaxial testen_HK
dc.subjectUndisturbed soilen_HK
dc.titleTriaxial test of undisturbed completely decomposed granite under CT monitoringen_HK
dc.typeArticleen_HK
dc.identifier.emailYue, Z:yueqzq@hkucc.hku.hken_HK
dc.identifier.emailTham, LG:hrectlg@hkucc.hku.hken_HK
dc.identifier.authorityYue, Z=rp00209en_HK
dc.identifier.authorityTham, LG=rp00176en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-2442658226en_HK
dc.identifier.hkuros85628en_HK
dc.identifier.volume23en_HK
dc.identifier.issue3en_HK
dc.identifier.spage365en_HK
dc.identifier.epage371en_HK
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridShang, Y=7101867915en_HK
dc.identifier.scopusauthoridWang, S=7410335510en_HK
dc.identifier.scopusauthoridYue, Z=7102782735en_HK
dc.identifier.scopusauthoridTham, LG=7006213628en_HK
dc.identifier.scopusauthoridZhao, J=16240157000en_HK

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