Deformation characteristics of modified iron tailings under different cyclic loading modes

JIANG Ping; WANG Zhichao; XIAO Jingping; WANG Wei; LI Na; CHEN Yewen; WU Erlu

doi:10.11779/CJGE2023S20010

Volume 45 Issue S2

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Chinese Journal of Geotechnical Engineering > 2023 > 45(S2): 104-109. > DOI: 10.11779/CJGE2023S20010

JIANG Ping, WANG Zhichao, XIAO Jingping, WANG Wei, LI Na, CHEN Yewen, WU Erlu. Deformation characteristics of modified iron tailings under different cyclic loading modes[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(S2): 104-109. DOI: 10.11779/CJGE2023S20010

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Deformation characteristics of modified iron tailings under different cyclic loading modes

JIANG Ping^{1, 2,},
WANG Zhichao^{1, 2},
XIAO Jingping³,
WANG Wei^{1, 2, ,},
LI Na^{1, 2},
CHEN Yewen^{1, 2},
WU Erlu^{1, 2}

1.
School of Civil Engineering, Shaoxing University, Shaoxing 312000, China
2.
Shaoxing Key Laboratory of Interaction between Soft Soil Foundation and Building Structure, Shaoxing 312000, China
3.
Huahui Engineering Design Group Co., Ltd., Shaoxing 312000, China

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Received Date: November 29, 2023
Available Online: April 19, 2024

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Abstract

Abstract

Using polypropylene fiber and cement to modify iron tailings, the effects of fiber content, dynamic-static ratio and curing age on the deformation characteristics of the fiber cement-modified iron tailing (FCIT) under different cyclic loading modes are explored through the dynamic triaxial tests. The research results show that: (1) The deformation behaviors of FCIT under intermittent loading and progressive loading are in the state of plastic stability and plastic creep at curing age of 7 d. (2) By comparing the deformations of continuous loading and intermittent loading, it is found that the variation range of the cumulative strain ( ${\varepsilon _{\text{p}}}$ ) of FCIT under intermittent loading is generally smaller than that of ${\varepsilon _{\text{p}}}$ caused by continuous loading. (3) Assigning a multiple factor to the cumulative strain of FCIT under progressive loading improves predictions for the cumulative strain under continuous loading. The corrected cumulative strain satisfies the prediction formula composed of power function and linear function.
- roadbed engineering,
- iron tailings,
- intermittent loading,
- progressive loading,
- deformation characteristic

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