Shear strength and dilatancy of partially saturated sand in direct shear tests

Fern, J, Soga, K and Robert, D 2015, 'Shear strength and dilatancy of partially saturated sand in direct shear tests', in F. Oka, A. Murakami, R. Uzuoka and S. Kimoto (ed.) Geomechanics from Micro to Macro, Cambridge, United Kingdom, 1-4 September 2014, pp. 1391-1396.


Document type: Conference Paper
Collection: Conference Papers

Title Shear strength and dilatancy of partially saturated sand in direct shear tests
Author(s) Fern, J
Soga, K
Robert, D
Year 2015
Conference name TC105 ISSMGE International Symposium on Geomechanics from Micro to Macro, IS-Cambridge 2014
Conference location Cambridge, United Kingdom
Conference dates 1-4 September 2014
Proceedings title Geomechanics from Micro to Macro
Editor(s) F. Oka, A. Murakami, R. Uzuoka and S. Kimoto
Publisher Taylor & Francis Group
Place of publication London, United Kingdom
Start page 1391
End page 1396
Total pages 6
Abstract It is well known that density, pressure and suction enhance the shear strength of unsaturated sand. However, little is known on the influence of all three together. Two series of direct shear tests have been conducted on two different silica sands at different densities and at low net stresses in order to investigate the influence of partial saturation on sand at different densities. The results show that the enhancement of the peak strength is more significant than the enhancement of the critical state strength and that the dilatancy rate is also enhanced. The stress-dilatancy analysis shows that the peak strength enhancement is the consequence of the critical state strength and dilatancy rate enhancements. A third sand, available in the literature, confirmed the findings.
Subjects Civil Geotechnical Engineering
Keyword(s) Critical current density (superconductivity)
Geomechanics Critical state
Different densities
Dilatancy rate
Direct shear test
Partial saturation
Partially saturated sands
Stress-dilatancy
Unsaturated sand
Copyright notice © 2015 Taylor & Francis Group
ISBN 9781138027077
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