Experimental study of the mechanical behavior of calcareous sand under repeated loading-unloading

doi:10.1007/s10064-021-02119-3

	Experimental study of the mechanical behavior of calcareous sand under repeated loading-unloading
	Wang, Xing 2; Cui, Jie 2; Zhu, Chang-Qi 1; Wu, Yang 2; Wang, Xin-Zhi 1
刊名	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
	2021-02-20
页码	17
关键词	Calcareous sand Loading mode Deviatoric stress level Effective confining pressure Volume-contraction during unloading Unloading rebound modulus
ISSN号	1435-9529
DOI	10.1007/s10064-021-02119-3
英文摘要	Understanding the mechanical behavior of calcareous sand under repeated loading-unloading is important to engineering design for island-reef underground caverns and pile foundation projects. In this study, we conducted conventional consolidated-drained triaxial shear tests on calcareous sand collected from the South China Sea under different effective confining pressures, and then, we performed multiple sets of triaxial repeated loading-unloading tests on calcareous sands with equivalent physical properties under different deviatoric stress levels and effective confining pressures. Based on the results, we conducted an in-depth investigation of the effects of the loading mode and effective confining pressure on the strain softening behavior and shear strength angle of calcareous sand. We studied the variation in the unloading rebound modulus as the effective confining pressure and deviatoric stress level changed, verified the applicability of the Dunkan-Chang model's estimation equation for the unloading rebound modulus to calcareous sand, and established the relationship among the volume contraction during unloading, the effective confining pressure, and the deviatoric stress level. The results of this study provide an important basis for selecting appropriate parameters for island-reef construction engineering.
资助项目	China Postdoctoral Science Foundation[2020M682653] ; 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	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000619745900002
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25768]
专题	中科院武汉岩土力学所
通讯作者	Wu, Yang
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	Wang, Xing,Cui, Jie,Zhu, Chang-Qi,et al. Experimental study of the mechanical behavior of calcareous sand under repeated loading-unloading[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2021:17.
APA	Wang, Xing,Cui, Jie,Zhu, Chang-Qi,Wu, Yang,&Wang, Xin-Zhi.(2021).Experimental study of the mechanical behavior of calcareous sand under repeated loading-unloading.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,17.
MLA	Wang, Xing,et al."Experimental study of the mechanical behavior of calcareous sand under repeated loading-unloading".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2021):17.