磷石膏的动力学特性试验研究

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Abstract The GDS dynamic triaxle test system with a bending element module was used to study systematically the dynamic characteristics of phosphogypsum.The dynamic parameters of phosphogypsum and their variation were investigated, such as the dynamic strength, dynamic shear modulus G d, damping ratio λ and dynamic pore water pressure μ d.The results show that the dynamic strength curve of phosphogypsum is in the form of a power function, and it is found the normalization of the dynamic strength curves under different confining pressure is made rather poorly.The initial dynamic shear modulus G d0 is in a power function relationship with the effective consolidation confining pressure σ ′0.The Davidenkov model was used to fit the dynamic shear modulus ratio G d/ G d0, and the normalization of the dynamic shear modulus ratio of phosphogypsum under different confining pressure is found to be better.With the increase of dry density and confining pressure, the pore pressure development curve of phosphogypsum varies its form “double S” to “single S”.Based on the Seed model, a pore pressure model suitable for the development of dynamic pore pressure of phosphogypsum was established.

Key words： phosphogypsum soil dynamics dynamic strength dynamic shear modulus damping ratio dynamic pore water pressure

Received: 26 February 2019 Published: 15 July 2020

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	Articles by authors
	LU Ting1
	2
	WEI Zuoan1
	2
	WANG Wensong1
	2
	YANG Yonghao1
	2
	CAO Guansen1
	2
	ZHUANG Sunning1
	2

Cite this article:

LU Ting1,2,WEI Zuoan1, et al. Experimental study on the dynamic characteristics of phosphogypsum[J]. JOURNAL OF VIBRATION AND SHOCK, 2020, 39(14): 264-271.

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http://jvs.sjtu.edu.cn/EN/ OR http://jvs.sjtu.edu.cn/EN/Y2020/V39/I14/264

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