Capillary water retention curve and shear strength of unsaturated soils

Zhou, A, Huang, R and Sheng, D 2016, 'Capillary water retention curve and shear strength of unsaturated soils', Canadian Geotechnical Journal, vol. 53, no. 6, pp. 974-987.


Document type: Journal Article
Collection: Journal Articles

Title Capillary water retention curve and shear strength of unsaturated soils
Author(s) Zhou, A
Huang, R
Sheng, D
Year 2016
Journal name Canadian Geotechnical Journal
Volume number 53
Issue number 6
Start page 974
End page 987
Total pages 14
Publisher National Research Council of Canada
Abstract This paper proposes a new water retention model for unsaturated soils, which takes into account capillary condensation of adsorbed water. In this model, the degree of saturation of a soil is separated into that based on capillary water and that based on adsorbed water. Through analysis of a partially saturated two-cylinder system, a new shear strength criterion for unsaturated soils is proposed, in which only the degree of saturation based on capillary water contributes to the variation of shear strength with suction. The proposed shear strength criterion is justified against thermodynamic principles and is compared against existing criteria in the literature, which shows that it provides a much improved prediction of the experimental data for a wide range of suction values.
Keyword(s) Capillary water retention
Shear strength
Thermodynamics
Unsaturated soils
DOI - identifier 10.1139/cgj-2015-0322
ISSN 0008-3674
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