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Thermo-mechanical behavior of reconstituted deep-water sediments

文献类型：期刊论文

作者Hu, Shijun1,3,4; Chen, Pan1,2; Wei, Changfu1,2; Wang, Yong1,2; Li, Pengchun5,6
刊名OCEAN ENGINEERING
出版日期2024-01-15
卷号292页码:11
关键词Deep -water sediments Undrained shear strength Thermo -mechanical behavior Thermo -mechanical paths NaCl concentration
ISSN号0029-8018
DOI10.1016/j.oceaneng.2023.116555
英文摘要Understanding the thermo-mechanical behavior of deep-water sediments is essential for the safe design of hightemperature oil/gas pipelines. In this study, a series of temperature-controlled triaxial tests was conducted to investigate the thermo-mechanical behavior of reconstituted deep-water sediments sampled from the South China Sea. The experimental results revealed the thermo-mechanical behavior of sediments was closely related to their thermo-mechanical loading paths and sodium chloride (NaCl) concentrations. The increasing rate of excess pore water pressure decreases with an increase in temperature increment, effective confining pressure, and overconsolidation ratio, regardless of NaCl concentration. For normally consolidated specimens, the undrained shear strength generally decreases as temperature increases. The undrained shear strength of specimens was lower under undrained heating and higher under drained heating than that at 5 degrees C, respectively. Factors such as thermal softening, thermal consolidation, and thermal-induced excess pore water pressure significantly impacted the undrained shear strength of sediments under isothermal, drained, and undrained heating conditions. Additionally, the undrained shear strength decreases with increasing NaCl concentration. The results highlighted that the critical state line is unique under varying loading paths and NaCl concentrations. Furthermore, the effect of changes in void ratio induced by NaCl solution on the shear strength of sediments was more pronounced than that of the intergranular stress.
资助项目Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0104]
WOS研究方向Engineering ; Oceanography
语种英语
WOS记录号WOS:001142425800001
出版者PERGAMON-ELSEVIER SCIENCE LTD
源URL[http://119.78.100.198/handle/2S6PX9GI/40353]  
专题中科院武汉岩土力学所
通讯作者Chen, Pan
作者单位1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.Powerchina Huadong Engn Co Ltd, Hangzhou 311122, Peoples R China
4.Zhejiang Huadong Construction Engn Co Ltd, Hangzhou 310014, Peoples R China
5.Chinese Acad Sci, Innovat Acad South China Sea Ecol & Environm Engn, South China Sea Inst Oceanol, Key Lab Ocean & Marginal Sea Geol, Guangzhou 510301, Peoples R China
6.Southern Marine Sci & Engn Guangdong Lab Guangzhou, Guangzhou 511458, Peoples R China
推荐引用方式
GB/T 7714		 Hu, Shijun,Chen, Pan,Wei, Changfu,et al. Thermo-mechanical behavior of reconstituted deep-water sediments[J]. OCEAN ENGINEERING,2024,292:11.
APA Hu, Shijun,Chen, Pan,Wei, Changfu,Wang, Yong,&Li, Pengchun.(2024).Thermo-mechanical behavior of reconstituted deep-water sediments.OCEAN ENGINEERING,292,11.
MLA Hu, Shijun,et al."Thermo-mechanical behavior of reconstituted deep-water sediments".OCEAN ENGINEERING 292(2024):11.

入库方式： OAI收割

来源：武汉岩土力学研究所

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