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Conference Paper: Macro and micro behaviour of soil fracturing

TitleMacro and micro behaviour of soil fracturing
Authors
Issue Date2006
Citation
Proceedings Of The International Symposium On Geomechanics And Geotechnics Of Particulate Media - Geomechanics And Geotechnics Of Particulate Media, 2006, p. 421-427 How to Cite?
Abstract
Soil fracturing due to fluid injection involves various macro- and micro-mechanisms. Soil fracturing tests were performed on clay and sand. Different fluids (water, epoxy and cement-bentonite) were injected in both normally consolidated and overconsolidated kaolin clay specimens, which all showed fractures. A distinct single fracture was observed for all overconsolidated clay specimens due to tensile fracture. For normally consolidated clay specimens, the fracture pattern is further dependent on the rheology of injection fluid. Multiple fractures resulted when high viscous epoxy and low water-cement ratio grouts were injected. When low viscous liquids and high water-cement ratio grouts were injected, a distinct single fracture was observed. Micro-behaviour related to plastic instability around the injection point has been suggested as a possible mechanism of fracturing in normally consolidated plastic clays. Results from injections tests of cement-bentonite grout into sand indicated that the magnitude of confining pressure and grout rheology have profound effects on the development of fingering-like fractures in sand. © 2006 Taylor & Francis Group.
Persistent Identifierhttp://hdl.handle.net/10722/110801
References

 

Author Affiliations
  1. The University of Hong Kong
  2. University of Cambridge
DC FieldValueLanguage
dc.contributor.authorSoga, Ken_HK
dc.contributor.authorGafar, KOen_HK
dc.contributor.authorNg, MYAen_HK
dc.contributor.authorAu, SKAen_HK
dc.date.accessioned2010-09-26T02:21:44Z-
dc.date.available2010-09-26T02:21:44Z-
dc.date.issued2006en_HK
dc.identifier.citationProceedings Of The International Symposium On Geomechanics And Geotechnics Of Particulate Media - Geomechanics And Geotechnics Of Particulate Media, 2006, p. 421-427en_HK
dc.identifier.urihttp://hdl.handle.net/10722/110801-
dc.description.abstractSoil fracturing due to fluid injection involves various macro- and micro-mechanisms. Soil fracturing tests were performed on clay and sand. Different fluids (water, epoxy and cement-bentonite) were injected in both normally consolidated and overconsolidated kaolin clay specimens, which all showed fractures. A distinct single fracture was observed for all overconsolidated clay specimens due to tensile fracture. For normally consolidated clay specimens, the fracture pattern is further dependent on the rheology of injection fluid. Multiple fractures resulted when high viscous epoxy and low water-cement ratio grouts were injected. When low viscous liquids and high water-cement ratio grouts were injected, a distinct single fracture was observed. Micro-behaviour related to plastic instability around the injection point has been suggested as a possible mechanism of fracturing in normally consolidated plastic clays. Results from injections tests of cement-bentonite grout into sand indicated that the magnitude of confining pressure and grout rheology have profound effects on the development of fingering-like fractures in sand. © 2006 Taylor & Francis Group.en_HK
dc.languageengen_HK
dc.relation.ispartofProceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Mediaen_HK
dc.titleMacro and micro behaviour of soil fracturingen_HK
dc.typeConference_Paperen_HK
dc.identifier.emailAu, SKA: skau@hkucc.hku.hken_HK
dc.identifier.authorityAu, SKA=rp00082en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-56149089640en_HK
dc.identifier.hkuros131531en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-56149089640&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.spage421en_HK
dc.identifier.epage427en_HK
dc.identifier.scopusauthoridSoga, K=7102442890en_HK
dc.identifier.scopusauthoridGafar, KO=25645964000en_HK
dc.identifier.scopusauthoridNg, MYA=25646591600en_HK
dc.identifier.scopusauthoridAu, SKA=7005391185en_HK

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