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On the mechanical behaviour of a coral silt from the South China Sea

文献类型：期刊论文

作者Yao, Ting1; Cao, Ziwei2; Li, Wei2
刊名GEOTECHNIQUE
出版日期2024-06-11
页码40
关键词coral silt one-dimensional compression shearing behaviour critical state line static liquefaction
ISSN号0016-8505
DOI10.1680/jgeot.24.00012
英文摘要During land reclamation on the reef islands, large amounts of silt-sized coral soils were created by segregation and degradation. The accumulation of silt-sized coral soils is fairy uncommon while the research on the geotechnical properties of the coral silt is very limited. In this study, a systematic experimental investigation on the mechanical behaviour of coral silt obtained from a reclaimed reef island in the South China Sea has been performed, with comparisons to the coral sand collected from the same area. Similar to the coral sand, the coral silt particles also exhibit irregular particle shape and intra-particle pore due to their nature origin. According to the limiting water contents, the coral silt is classified as a low-plasticity clayey silt. Under one-dimensional compression, the coral silt exhibits a much quicker convergence compared to coral sand. Prior to convergence, the compressibility of coral silt is higher. After yielding, the compressibility of coral sand becomes higher due to significant particle breakage. The loose coral silt subjected to undrained shearing at low confining pressures exhibits obvious strain softening behaviour, indicating static liquefaction or flow failure. The critical state and peak friction angles of coral silt are lower than those of coral sand but much higher than those of the other terrigenous clayey silts. A curved critical state line with well-defined horizontal asymptote in the deviatoric stress - mean effective stress plane is identified for coral silt, again indicating higher potential to static liquefaction.
资助项目National Natural Science Foundation of China[42177154] ; National Natural Science Foundation of China[42102327] ; National Key Technologies R&D Program of China[2022YFC3102101] ; Open Fund of Key Laboratory of Special Environment Road Engineering of Hunan Province, Changsha University of Science Technology[kfj220503]
WOS研究方向Engineering
语种英语
WOS记录号WOS:001247305100001
出版者EMERALD GROUP PUBLISHING LTD
源URL[http://119.78.100.198/handle/2S6PX9GI/41676]  
专题中科院武汉岩土力学所
通讯作者Li, Wei
作者单位1.Chinese Acad Sci, Inst Rock & Soil Mech, Sate Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China
2.China Univ Geosci, Fac Engn, Wuhan, Peoples R China
推荐引用方式
GB/T 7714		 Yao, Ting,Cao, Ziwei,Li, Wei. On the mechanical behaviour of a coral silt from the South China Sea[J]. GEOTECHNIQUE,2024:40.
APA Yao, Ting,Cao, Ziwei,&Li, Wei.(2024).On the mechanical behaviour of a coral silt from the South China Sea.GEOTECHNIQUE,40.
MLA Yao, Ting,et al."On the mechanical behaviour of a coral silt from the South China Sea".GEOTECHNIQUE (2024):40.

入库方式： OAI收割

来源：武汉岩土力学研究所

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