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Conference Paper: Macro and micro behaviour of soil fracturing
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TitleMacro and micro behaviour of soil fracturing
 
AuthorsSoga, K2
Gafar, KO2
Ng, MYA2
Au, SKA1
 
Issue Date2006
 
CitationProceedings Of The International Symposium On Geomechanics And Geotechnics Of Particulate Media - Geomechanics And Geotechnics Of Particulate Media, 2006, p. 421-427 [How to Cite?]
 
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.
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorSoga, K
 
dc.contributor.authorGafar, KO
 
dc.contributor.authorNg, MYA
 
dc.contributor.authorAu, SKA
 
dc.date.accessioned2010-09-26T02:21:44Z
 
dc.date.available2010-09-26T02:21:44Z
 
dc.date.issued2006
 
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.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationProceedings Of The International Symposium On Geomechanics And Geotechnics Of Particulate Media - Geomechanics And Geotechnics Of Particulate Media, 2006, p. 421-427 [How to Cite?]
 
dc.identifier.epage427
 
dc.identifier.hkuros131531
 
dc.identifier.scopuseid_2-s2.0-56149089640
 
dc.identifier.spage421
 
dc.identifier.urihttp://hdl.handle.net/10722/110801
 
dc.languageeng
 
dc.relation.ispartofProceedings of the International Symposium on Geomechanics and Geotechnics of Particulate Media - Geomechanics and Geotechnics of Particulate Media
 
dc.relation.referencesReferences in Scopus
 
dc.titleMacro and micro behaviour of soil fracturing
 
dc.typeConference_Paper
 
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Author Affiliations
  1. The University of Hong Kong
  2. University of Cambridge