The Effects of Temperature on One-Dimensional Consolidation and Creep Behaviors of Hong Kong Marine Deposits
Publication: International Journal of Geomechanics
Volume 23, Issue 12
Abstract
The consolidation of Hong Kong marine deposits (HKMDs), a typical soft clayey soil in Hong Kong, is a serious concern in engineering practices, such as coastal embankment construction and marine reclamations. Previous research works illustrate that high temperatures could accelerate the rate of consolidation of soft clayey soils, which has a great potential in future applications. Therefore, studies on the consolidation and stress–strain behaviors of clayey soils under various thermal conditions are necessary. In this paper, a modified temperature-controlled oedometer has been developed and employed to investigate the effects of vertical stress and temperature on the consolidation and creep behavior of remolded HKMD with a temperature range of 20°C–60°C. Scanning electrical microscope (SEM) tests were performed to observe the microstructure of HKMD specimens after oedometer tests under different temperatures. The results show that compression index Cc is nearly independent of temperature, while swelling index Cs is slightly affected by the thermal and stress paths. As temperature increases, both permeability and coefficient of consolidation increase, and the duration to the end of primary consolidation is shortened. It has also been found that with an increase of temperature, the preconsolidation pressure decreases, and there is a reduction in linear creep rate and creep strain limit. Both linear and nonlinear creep functions are adopted to analyze the creep behavior.
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Data Availability Statement
All data, models, or codes that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This research was funded by an RIF project and a GRF project, Grant Nos. R5037-18F and 15210020 from RGC of HKSARG of China; two grants of the Research Institute of Land of Space, The Hong Kong Polytechnic University, grant numbers CD82 and CD7A; National Natural Science Foundation of China, Grant No. 52278356, Project from Shenzhen Science and Technology Innovation Commission, JCYJ20210324105210028, Natural Science Foundation of Guangdong Province, China, 2022A1515010118, and the grant of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Grant Nos. K19313901 and GML2019ZD0210.
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Published In
International Journal of Geomechanics
Volume 23 • Issue 12 • December 2023
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© 2023 American Society of Civil Engineers.
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Received: Aug 2, 2022
Accepted: May 21, 2023
Published online: Sep 20, 2023
Published in print: Dec 1, 2023
Discussion open until: Feb 20, 2024
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