Experimental Study on the Impact of Water Content on the Strength Parameters of Coral Gravelly Sand

doi:10.3390/jmse8090634

	Experimental Study on the Impact of Water Content on the Strength Parameters of Coral Gravelly Sand
	Wu, Yang 2; Wang, Xing 2; Shen, Jian-Hua 1; Cui, Jie 2; Zhu, Chang-Qi 1; Wang, Xin-Zhi 1
刊名	JOURNAL OF MARINE SCIENCE AND ENGINEERING
	2020-09-01
卷号	8 期号:9 页码:25
关键词	coral gravelly sand water content strength parameters microstructure particle breakage plastic work
DOI	10.3390/jmse8090634
英文摘要	The effect of capillary water caused by heavy rainfall and groundwater level fluctuations can induce the erosion and collapse of island reef coral sand foundations. Here, the effects of water content (omega) on the shear strength parameters of coral gravelly sand are analyzed at the macro and micro scales by laboratory consolidated-drained triaxial compression and nuclear magnetic resonance tests. Furthermore, particle breakage characteristics of coral gravelly sand under the static load are discussed. With increasing omega, (1) the internal friction angle increases slightly (<1 degrees) then decreases; (2) the apparent cohesion is more sensitive to the change in the omega; (3) with an increase from 5.4% to 21.3%, the bound water content remains almost unchanged; (4) the capillary water content is the main factor impacting the apparent cohesion; (5) the increase in free water content is the internal cause of the decreasing internal friction angle of coral gravelly sand with omega> 11.1%; and (6) the particle breakage increases, and there is an approximately linear relationship between the median particle diameter (d(50)) and relative breakage index (Br). The established physical model can reflect the influence of water content and plastic work and describe the evolution law of particle breakage.
资助项目	Consultative Project by Chinese Academy of Engineering[2019-XZ-18] ; National Natural Science Foundation of China[41877271] ; National Natural Science Foundation of China[51908153] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA13010301] ; Guangzhou City Technology and Science Program[201904010278]
WOS研究方向	Oceanography
语种	英语
出版者	MDPI
WOS记录号	WOS:000579980600001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24942]
专题	中科院武汉岩土力学所
通讯作者	Wang, Xing
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geotech Mech & Engn, Wuhan 430071, Peoples R China 2.Guangzhou Univ, Sch Civil Engn, Guangzhou 510006, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yang,Wang, Xing,Shen, Jian-Hua,et al. Experimental Study on the Impact of Water Content on the Strength Parameters of Coral Gravelly Sand[J]. JOURNAL OF MARINE SCIENCE AND ENGINEERING,2020,8(9):25.
APA	Wu, Yang,Wang, Xing,Shen, Jian-Hua,Cui, Jie,Zhu, Chang-Qi,&Wang, Xin-Zhi.(2020).Experimental Study on the Impact of Water Content on the Strength Parameters of Coral Gravelly Sand.JOURNAL OF MARINE SCIENCE AND ENGINEERING,8(9),25.
MLA	Wu, Yang,et al."Experimental Study on the Impact of Water Content on the Strength Parameters of Coral Gravelly Sand".JOURNAL OF MARINE SCIENCE AND ENGINEERING 8.9(2020):25.