Instability of dilative sand
A type of pre-failure instability which occurs for medium loose to dense sand under fully drained conditions is studied in this paper. It is observed experimentally that when a specimen is sheared along a drained stress path involving a decrease in the effective mean stress, it becomes unstable afte...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Thomas Telford (ICE Publishing)
2015
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| Online Access: | https://eprints.nottingham.ac.uk/49584/ |
| _version_ | 1848798030662205440 |
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| author | Chu, J. Wanatowski, D. Leong, W.K. Loke, W.L. He, J. |
| author_facet | Chu, J. Wanatowski, D. Leong, W.K. Loke, W.L. He, J. |
| author_sort | Chu, J. |
| building | Nottingham Research Data Repository |
| collection | Online Access |
| description | A type of pre-failure instability which occurs for medium loose to dense sand under fully drained conditions is studied in this paper. It is observed experimentally that when a specimen is sheared along a drained stress path involving a decrease in the effective mean stress, it becomes unstable after the stress path crosses an instability line. The instability line specifies a minimum stress ratio under which instability may occur. It is not unique, but changes with the void ratio of the soil and the applied effective stresses. The instability occurring under drained conditions is different from that under undrained conditions. The differences and similarities between the two types of instability are pointed out. Practical implications of the study in analysing the failure mechanisms of granular soil slopes under various drainage conditions are discussed. |
| first_indexed | 2025-11-14T20:13:18Z |
| format | Article |
| id | nottingham-49584 |
| institution | University of Nottingham Malaysia Campus |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T20:13:18Z |
| publishDate | 2015 |
| publisher | Thomas Telford (ICE Publishing) |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | nottingham-495842018-02-08T10:23:15Z https://eprints.nottingham.ac.uk/49584/ Instability of dilative sand Chu, J. Wanatowski, D. Leong, W.K. Loke, W.L. He, J. A type of pre-failure instability which occurs for medium loose to dense sand under fully drained conditions is studied in this paper. It is observed experimentally that when a specimen is sheared along a drained stress path involving a decrease in the effective mean stress, it becomes unstable after the stress path crosses an instability line. The instability line specifies a minimum stress ratio under which instability may occur. It is not unique, but changes with the void ratio of the soil and the applied effective stresses. The instability occurring under drained conditions is different from that under undrained conditions. The differences and similarities between the two types of instability are pointed out. Practical implications of the study in analysing the failure mechanisms of granular soil slopes under various drainage conditions are discussed. Thomas Telford (ICE Publishing) 2015-03 Article PeerReviewed application/pdf en cc_by https://eprints.nottingham.ac.uk/49584/1/Instability_of_dilative_sand.pdf Chu, J., Wanatowski, D., Leong, W.K., Loke, W.L. and He, J. (2015) Instability of dilative sand. Geotechnical Research, 2 (1). pp. 35-48. ISSN 2052-6156 failures ; granular materials ; strength and testing of materials https://www.icevirtuallibrary.com/doi/10.1680/gr.14.00015 doi:10.1680/gr.14.00015 doi:10.1680/gr.14.00015 |
| spellingShingle | failures ; granular materials ; strength and testing of materials Chu, J. Wanatowski, D. Leong, W.K. Loke, W.L. He, J. Instability of dilative sand |
| title | Instability of dilative sand |
| title_full | Instability of dilative sand |
| title_fullStr | Instability of dilative sand |
| title_full_unstemmed | Instability of dilative sand |
| title_short | Instability of dilative sand |
| title_sort | instability of dilative sand |
| topic | failures ; granular materials ; strength and testing of materials |
| url | https://eprints.nottingham.ac.uk/49584/ https://eprints.nottingham.ac.uk/49584/ https://eprints.nottingham.ac.uk/49584/ |