The compressive behaviours and microscopic characteristics of deep-sea soft soil with deionized or sea water

被引:1
|
作者
Jiang, Mingjing [1 ,2 ,3 ,4 ]
Li, Guangshuai [1 ]
Lei, Huayang [1 ]
Li, Zhiyuan [3 ]
机构
[1] Tianjin Univ, Sch Civil Engn, Dept Civil Engn, Tianjin, Peoples R China
[2] Suzhou Univ Sci & Technol, Sch Civil Engn, Suzhou, Peoples R China
[3] Tongji Univ, State Key Lab Disaster Reduct Civil Engn, Shanghai, Peoples R China
[4] Suzhou Univ Sci & Technol, Sch Civil Engn, 1701 Binhe Rd, Suzhou 215009, Jiangsu, Peoples R China
关键词
Deep-sea soft soil from South China Sea; pore water environments; laboratory tests; compressive behaviours; microscopic characteristics; RESIDUAL SHEAR-STRENGTH; PORE-WATER; GEOTECHNICAL PROPERTIES; SILTY CLAY; CONSOLIDATION; SEDIMENTS; SALINITY; FLUID; CHEMISTRY; PRESSURE;
D O I
10.1080/1064119X.2023.2283206
中图分类号
P75 [海洋工程];
学科分类号
0814 ; 081505 ; 0824 ; 082401 ;
摘要
To investigate the effects of different pore water environments on compressive behaviours of the deep-sea soft soil from South China Sea, four kinds of soil samples including natural sample with sea water or deionized water, remolded sample with sea water or deionized water were prepared, respectively. Then, a series of oedometer tests and scanning electron microscopy tests were performed on the above samples to examine their compressive behaviours and microscopic characteristics, respectively. Additionally, the microscopic pore distribution of natural sample with sea water was observed by mercury intrusion porosimetry tests. The effects of different water environments on macroscopic compressive behaviours and microscopic particle characteristics are analyzed. The deionized water environment increases the compressibility and decreases the consolidation coefficient for natural samples after structural breakage and remolding. The microscopic particle characteristics corresponding to the macroscopic compressibility are also qualitatively analyzed. In deionized water environment, soil particles exhibit higher roundness, more orderly and lower surface roughness than that in seawater environment. In this study, the deionized water environment has no obvious effect on the structural yield stress and secondary consolidation coefficients of deep-sea soft soil.
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页码:1474 / 1486
页数:13
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