Experimental investigation on mechanical behavior and particle crushing of calcareous sand retrieved from South China Sea

doi:10.1016/j.enggeo.2020.105932

	Experimental investigation on mechanical behavior and particle crushing of calcareous sand retrieved from South China Sea
	Wu, Yang 3,4; Li, Neng 3; Wang, Xinzhi 2,5; Cui, Jie 3,4; Chen, Yulong 6; Wu, Yihang 3; Yamamoto, Haruyuki 1
刊名	ENGINEERING GEOLOGY
	2021
卷号	280 页码:14
关键词	Calcareous sand Particle crushing Critical state Shear strength State bounding surface
ISSN号	0013-7952
DOI	10.1016/j.enggeo.2020.105932
英文摘要	Calcareous sand containing weak particles originated from the deposition of skeletal residue of marine organisms is susceptible to significant particle crushing under compression and shearing. The breakage of grains results in excessive deformation and foundation failure. This study focuses on the mechanical properties and particle crushing of calcareous sand retrieved from Nansha Island, South China Sea. A series of isotropically drained and undrained triaxial compression tests were performed on reconstituted calcareous sand samples at different initial densities and at a wide range of confining stresses. The amount of particle crushing for calcareous sand after shearing was measured and quantified. Experimental results demonstrate that the shear response of calcareous sand had been well interpreted within the critical state framework. The amount of particle crushing for calcareous sand increases with increasing density and confining stress. Compared with the undrained condition, a larger amount of particle crushing of calcareous sands is observed in the drained triaxial compression test. Stress-dilatancy curves exhibit similar varying tendency for calcareous sand. Multiple critical state lines for calcareous sands with different initial densities are identified in the void ratio and logarithm of the mean stress plane. Considering the variation in stress ratio at the critical state induced by particle crushing, all stress paths are normalized to determine the state bounding surface for calcareous sand at varying densities and stresses.
资助项目	National Natural Science Foundation of China[51908153] ; National Natural Science Foundation of China[41572297] ; Guangzhou City Technology and Science Program[201904010278] ; Open fund of Key Laboratory of Earthquake Engineering and Engineering Vibration, China Earthquake Administration[2020D01]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000615526300018
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25927]
专题	中科院武汉岩土力学所
通讯作者	Cui, Jie; Chen, Yulong
作者单位	1.Hiroshima Univ, Grad Int Dev & Cooperat, Hiroshima, Japan 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Guangzhou Univ, Sch Civil Engn, Guangzhou, Peoples R China 4.Guangzhou Univ, Guangdong Prov Engn & Technol Res Ctr Geostruct S, Guangzhou, Guangdong, Peoples R China 5.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan, Peoples R China 6.China Univ Min & Technol, Sch Energy & Min Engn, Xuzhou, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wu, Yang,Li, Neng,Wang, Xinzhi,et al. Experimental investigation on mechanical behavior and particle crushing of calcareous sand retrieved from South China Sea[J]. ENGINEERING GEOLOGY,2021,280:14.
APA	Wu, Yang.,Li, Neng.,Wang, Xinzhi.,Cui, Jie.,Chen, Yulong.,...&Yamamoto, Haruyuki.(2021).Experimental investigation on mechanical behavior and particle crushing of calcareous sand retrieved from South China Sea.ENGINEERING GEOLOGY,280,14.
MLA	Wu, Yang,et al."Experimental investigation on mechanical behavior and particle crushing of calcareous sand retrieved from South China Sea".ENGINEERING GEOLOGY 280(2021):14.