Instability of dilative sand

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

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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.

Item Type: Article
Keywords: failures ; granular materials ; strength and testing of materials
Schools/Departments: University of Nottingham Ningbo China > Faculty of Science and Engineering > Department of Civil Engineering
Identification Number:
Depositing User: CHEN, Jiaorong
Date Deposited: 07 Feb 2018 08:44
Last Modified: 08 Feb 2018 10:23

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