The Effects of Temperature on One-Dimensional Consolidation and Creep Behaviors of Hong Kong Marine Deposits

Li, An1; Chen, Ze-Jian1; Feng, Wei-Qiang2; Yin, Jian-Hua1

2023-12-01

10.1061/IJGNAI.GMENG-8278

INTERNATIONAL JOURNAL OF GEOMECHANICS   影响因子和分区

1532-3641

1943-5622

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 degrees C-60 degrees 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.

Temperature effect Nonlinear creep Consolidation Soft soils Permeability Creep strain limit

SCI ; EI

英语

通讯

RIF project["R5037-18F","15210020"] ; RGC of HKSARG of China["CD82","CD7A"] ; Hong Kong Polytechnic University[52278356] ; National Natural Science Foundation of China[JCYJ20210324105210028] ; Shenzhen Science and Technology Innovation Commission[2022A1515010118] ; Natural Science Foundation of Guangdong Province, China["K19313901","GML2019ZD0210"]

Engineering

Engineering, Geological

WOS:001084767800016

ASCE-AMER SOC CIVIL ENGINEERS

20234014843870

Creep ; Deposits ; Geotechnical engineering ; Soil mechanics ; Soils ; Strain rate ; Temperature

Civil Engineering, General:409 ; Geology and Geophysics:481 ; Soils and Soil Mechanics:483.1 ; Thermodynamics:641.1 ; Materials Science:951

Web of Science

1.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong 999077, Peoples R China
2.Southern Univ Sci & Technol, Dept Ocean Sci & Engn, Shenzhen 518055, Peoples R China

Li, An,Chen, Ze-Jian,Feng, Wei-Qiang,et al. The Effects of Temperature on One-Dimensional Consolidation and Creep Behaviors of Hong Kong Marine Deposits[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2023,23(12).

Li, An,Chen, Ze-Jian,Feng, Wei-Qiang,&Yin, Jian-Hua.(2023).The Effects of Temperature on One-Dimensional Consolidation and Creep Behaviors of Hong Kong Marine Deposits.INTERNATIONAL JOURNAL OF GEOMECHANICS,23(12).

Li, An,et al."The Effects of Temperature on One-Dimensional Consolidation and Creep Behaviors of Hong Kong Marine Deposits".INTERNATIONAL JOURNAL OF GEOMECHANICS 23.12(2023).