单颗粒与单粒组钙质砂破碎特性及其关联关系研究

doi:10.13722/j.cnki.jrme.2021.1148

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Abstract A total of 150 single compression tests and 18 uniformly-graded sample one dimensional compression tests for three different size groups carbonate sand were conducted to investigate the crushing characteristics of single particle and uniformly-graded sample and their association relationship. According to the load-displacement curve of single particle compression，crushing strength and ultimate strength were defined to distinguish two crushing states，i.e.，the local crushing state and global crushing state，and then the strength characteristic and the fractal characteristic of single particle were discussed by considering two different crushing states. Through detail analysis of uniformly-graded sample grading evolution subjected to one-dimensional compression，the crushing fractal evolution and fractal limit of uniformly-graded sample was explored. Based on fractal theory，a fractal evolution function for uniformly-graded sample was established by introducing the calculation of breakage ratio，which reveals the evolution mechanism of fractal behavior of uniformly-graded sample and its relationship with fractal characteristic of single particle. The feasibility of the proposed fractal evolution function for uniformly-graded sample was finally verified using the experimental data.

Key words： soil mechanics carbonate sand single particle uniformly-graded sample fractal dimension breakage ratio

Corresponding Authors: (1. School of Civil Engineering，Tianjin University，Tianjin 300350，China；2. State Key Laboratory of Hydraulic Engineering Simulation and Safety，Tianjin University，Tianjin 300350，China；3. School of Civil Engineering，Hebei University of Science and Technology，Shijiazhuang，Hebei 050018，China；4. School of Mechanics and Engineering，Liaoning Technical University，Fuxin，Liaoning 123000，China；5. China Harbor LLC，Beijing 100027，China)

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	YANG Yang1
	2
	ZHANG Chunhui3
	4
	CUI Enjie3
	WANG Le1
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	HE Junbiao5

Cite this article:

YANG Yang1,2,ZHANG Chunhui3, et al. The crushing characteristics of single particle and uniformly-graded sample of carbonate sand and their association relationship[J]. , 2022, 41(S2): 3410-3418.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.1148 OR https://rockmech.whrsm.ac.cn/EN/Y2022/V41/IS2/3410

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