Influence of Particle Breakage on Drained Shear Strength of Calcareous Sands

doi:10.1061/(ASCE)GM.1943-5622.0002078

	Influence of Particle Breakage on Drained Shear Strength of Calcareous Sands
	Wei, Houzhen 1; Li, Xiaoxiao 1,2; Zhang, Shuodong 3; Zhao, Tao 3; Yin, Mei 3; Meng, Qingshan 1
刊名	INTERNATIONAL JOURNAL OF GEOMECHANICS
	2021-07-01
卷号	21 期号:7 页码:9
关键词	Calcareous sands Triaxial shear test Particle breakage Shear strength Dilatancy
ISSN号	1532-3641
DOI	10.1061/(ASCE)GM.1943-5622.0002078
英文摘要	The consolidated drained triaxial shear tests have been performed in this work to investigate the shearing behavior of calcareous sands sampled from the South China Sea, with the focus on analyzing the influence of particle breakage on the materials shear strength. At approaching the failure limit state, the intense particle breakage and rearrangements prevented the shear stress from increasing further. Depending on the initial packing density, the loose sand sample exhibited the strain-hardening response, while the dense sand sample exhibited the strain-softening response with clear shear dilatancy after the peak shear strength has been reached. However, when the confining pressure increased, particle breakage occurred more thoroughly, and the sharpness of the peak stress disappeared gradually. For the series of tests, an upper limit of relative particle breakage existed, beyond which the confining pressure and relative density had little influence on the breakage of particles. The shear strength of calcareous sands was found to be determined by the combined effects of interparticle friction, sample dilatancy, and particle breakage. Under low confining pressures, the shear strength was mainly controlled by particle friction and sample dilatancy, while under high confining pressures, the effect of particle breakage was dominant. In this process, the volumetric strain evolved from dilation to contraction and the sample dilatancy angle decreased gradually. After breakage, the particle shape transformed from highly angular to subrounded.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19060301] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA13010200] ; National Natural Science Foundation of China[41877260] ; National Natural Science Foundation of China[41877267] ; State Key Laboratory of Geomechanics and Geotechnical Engineering[Z019004]
WOS研究方向	Engineering
语种	英语
出版者	ASCE-AMER SOC CIVIL ENGINEERS
WOS记录号	WOS:000657451200025
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27448]
专题	中科院武汉岩土力学所
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Dept Engn Sci, Beijing 100049, Peoples R China 3.Brunel Univ London, Dept Civil & Environm Engn, London UB8 3PH, England
推荐引用方式 GB/T 7714	Wei, Houzhen,Li, Xiaoxiao,Zhang, Shuodong,et al. Influence of Particle Breakage on Drained Shear Strength of Calcareous Sands[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2021,21(7):9.
APA	Wei, Houzhen,Li, Xiaoxiao,Zhang, Shuodong,Zhao, Tao,Yin, Mei,&Meng, Qingshan.(2021).Influence of Particle Breakage on Drained Shear Strength of Calcareous Sands.INTERNATIONAL JOURNAL OF GEOMECHANICS,21(7),9.
MLA	Wei, Houzhen,et al."Influence of Particle Breakage on Drained Shear Strength of Calcareous Sands".INTERNATIONAL JOURNAL OF GEOMECHANICS 21.7(2021):9.