Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/29855
Title: Time-dependent stress-strain behavior of soft Hong Kong marine deposits
Authors: Zhu, JG
Yin, JH 
Luk, ST
Keywords: Creep
Marine deposits
Strain rate effects
Stress relaxation
Time-dependent
Triaxial compression test
Triaxial extension test
Issue Date: 1999
Source: Geotechnical testing journal, 1999, v. 22, no. 2, p. 118-126 How to cite?
Journal: Geotechnical Testing Journal 
Abstract: To investigate the time-dependent stress-strain behavior of Hong Kong marine deposits (HKMD), three types of triaxial tests have been conducted under both compression and extension states. The first is conventional undrained shear tests at different strain rates ranging from 0.0025 to 0.25%/min. The second type is stress relaxation tests. The last type is undrained creep tests. The results are reported in this paper. One order increment of logarithmic strain rate causes about 5 to 9% increase of undrained shear strength. In stress relaxation tests, the pore-water pressure increase is about 10% of the consolidation pressure under extension states. A power law equation is presented to calculate the decay of the deviator stress in relaxation. In multi-stage triaxial creep tests, the log(strain rate)-log(t) relationship of the lower stress level is linear. The slopes of these lines are dependent on current deviator stress as well as stress history.
URI: http://hdl.handle.net/10397/29855
ISSN: 0149-6115
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