Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/86617
Title: Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil
Authors: Priono
Rahardjo, Harianto
Chatterjea, Kalyani
Leong, Eng-Choon
Keywords: Hydraulic Anisotropy
Unsaturated Soil
Issue Date: 2017
Source: Priono., Rahardjo, H., Chatterjea, K., & Leong, E.-C. (2017). Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil. Canadian Geotechnical Journal, 54(7), 1034-1046.
Series/Report no.: Canadian Geotechnical Journal
Abstract: Hydraulic anisotropy behavior of unsaturated soil has not been fully investigated. Direct laboratory measurement and indirect determination of hydraulic anisotropy under a drying condition were carried out on statically compacted specimens having different initial conditions. Direct measurement of permeability was carried out using an unsaturated triaxial permeameter whereas indirect determination of permeability was performed through statistical estimation via a measured drying soil–water characteristic curve (SWCC). In this research, two orientations — specifically horizontal-layering (HL) and vertical-layering (VL) orientations — were prepared for a given specimen from statically compacted homogeneous sand–kaolin. The results from both direct measurement and indirect determination of hydraulic anisotropy were in good agreement. Hydraulic anisotropy under an unsaturated condition was found to be similar with that in a saturated condition. Moreover, hydraulic anisotropy was reflected in the ratio of transient time during the direct measurements of HL and VL specimens at high matric suctions. In contrast, in the indirect method, hydraulic anisotropy was reflected in the ratio of equalization time during SWCC tests at matric suctions higher than the air-entry value of the soil.
URI: https://hdl.handle.net/10356/86617
http://hdl.handle.net/10220/44120
ISSN: 0008-3674
DOI: 10.1139/cgj-2016-0023
Rights: © 2017 The Authors. This is the author created version of a work that has been peer reviewed and accepted for publication in Canadian Geotechnical Journal, published by NRC Research Press on behalf of The Authors. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document.  The published version is available at: [http://dx.doi.org/10.1139/cgj-2016-0023].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:IGS Journal Articles

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