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Undrained stiffness anisotropy from Hollow Cylinder experiments on four Eocene-to-Jurassic UK stiff clays

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Brosse et al, Geotech, accepted August 2016.pdfAccepted version1.65 MBAdobe PDFView/Open
Title: Undrained stiffness anisotropy from Hollow Cylinder experiments on four Eocene-to-Jurassic UK stiff clays
Authors: Brosse, AM
Jardine, RJ
Nishimura, S
Item Type: Journal Article
Abstract: The paper describes the anisotropic undrained stiffness behaviour of four medium-plasticity heavily overconsolidated UK stiff marine clays as revealed through Hollow Cylinder testing. The experiments contributed to two broader studies on stiff-to-hard London, Gault, Kimmeridge, and Oxford clay strata. They involved static and dynamic testing of multiple high quality natural specimens sampled at similar depths from inland sites. This paper explores the directional dependency of the clays’ highly non-linear undrained stiffness characteristics. New data-analysis approaches are outlined that allow the stiffnesses associated with one dimensional vertical, horizontal or pure horizontal shear modes to be isolated in complex undrained stress paths. In the presented experiments, loading progressed from in-situ stresses to reach ultimate failure at a range of final major principal stress orientation angles α (defined in the vertical plane) while keeping fixed values of the intermediate principal stress ratio, b. The tests reveal strong undrained stiffness anisotropy that can impact significantly on the prediction and understanding of ground deformation patterns in numerous geotechnical engineering applications.
Issue Date: 13-Oct-2016
Date of Acceptance: 1-Oct-2016
URI: http://hdl.handle.net/10044/1/42917
DOI: https://dx.doi.org/10.1139/cgj-2015-0320
ISSN: 1208-6010
Publisher: NRC Research Press
Start Page: 313
End Page: 332
Journal / Book Title: Canadian Geotechnical Journal
Volume: 54
Issue: 3
Copyright Statement: © 2016 NRC Research Press (Canadian Science Publishing)
Sponsor/Funder: Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Engineering & Physical Science Research Council (EPSRC)
Funder's Grant Number: GR/R73256/01
EP/C528484/1
EP/D506387/1
EP/E029957/1
Keywords: Science & Technology
Technology
Physical Sciences
Engineering, Geological
Geosciences, Multidisciplinary
Engineering
Geology
clays
laboratory tests
stiffness
anisotropy
stress path.
NATURAL LONDON CLAY
TRIAXIAL APPARATUS
SOIL STIFFNESS
STRAINS
Geological & Geomatics Engineering
0905 Civil Engineering
0907 Environmental Engineering
Publication Status: Published
Appears in Collections:Faculty of Engineering
Civil and Environmental Engineering



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