Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil
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 p...
| Main Authors: | , , , |
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| Format: | Journal Article |
| Language: | English |
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2017
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| Online Access: | https://hdl.handle.net/10356/86617 http://hdl.handle.net/10220/44120 |
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| author | Priono Rahardjo, Harianto Chatterjea, Kalyani Leong, Eng-Choon |
| author2 | Interdisciplinary Graduate School (IGS) |
| author_facet | Interdisciplinary Graduate School (IGS) Priono Rahardjo, Harianto Chatterjea, Kalyani Leong, Eng-Choon |
| author_sort | Priono |
| collection | NTU |
| description | 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. |
| first_indexed | 2025-02-19T03:09:19Z |
| format | Journal Article |
| id | ntu-10356/86617 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:09:19Z |
| publishDate | 2017 |
| record_format | dspace |
| spelling | ntu-10356/866172020-11-01T04:45:47Z Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil Priono Rahardjo, Harianto Chatterjea, Kalyani Leong, Eng-Choon Interdisciplinary Graduate School (IGS) National Institute of Education School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Residues and Resource Reclamation Centre Hydraulic Anisotropy Unsaturated Soil 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. Accepted version 2017-12-12T03:31:31Z 2019-12-06T16:25:51Z 2017-12-12T03:31:31Z 2019-12-06T16:25:51Z 2017 Journal Article 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. 0008-3674 https://hdl.handle.net/10356/86617 http://hdl.handle.net/10220/44120 10.1139/cgj-2016-0023 en Canadian Geotechnical Journal © 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]. 49 p. application/pdf |
| spellingShingle | Hydraulic Anisotropy Unsaturated Soil Priono Rahardjo, Harianto Chatterjea, Kalyani Leong, Eng-Choon Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil |
| title | Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil |
| title_full | Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil |
| title_fullStr | Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil |
| title_full_unstemmed | Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil |
| title_short | Laboratory investigation on hydraulic anisotropy behavior of unsaturated soil |
| title_sort | laboratory investigation on hydraulic anisotropy behavior of unsaturated soil |
| topic | Hydraulic Anisotropy Unsaturated Soil |
| url | https://hdl.handle.net/10356/86617 http://hdl.handle.net/10220/44120 |
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