Creep model for rockfill materials based on particle breakage energy consumption

CHEN Ziyu; LI Guoying; MI Zhankuan; WEI Kuangmin

doi:10.11779/CJGE20230202

Volume 46 Issue 6

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Chinese Journal of Geotechnical Engineering > 2024 > 46(6): 1155-1165. > DOI: 10.11779/CJGE20230202

CHEN Ziyu, LI Guoying, MI Zhankuan, WEI Kuangmin. Creep model for rockfill materials based on particle breakage energy consumption[J]. Chinese Journal of Geotechnical Engineering, 2024, 46(6): 1155-1165. DOI: 10.11779/CJGE20230202

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Creep model for rockfill materials based on particle breakage energy consumption

CHEN Ziyu^1,,
LI Guoying^{1, 2},
MI Zhankuan^{1, 2, ,},
WEI Kuangmin^{1, 2}

1.
Nanjing Hydraulic Research Institute, Nanjing 210029, China
2.
Key Laboratory of Reservoir & Dam Safety of the Ministry of Water Resources, Nanjing 210029, China

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Received Date: March 08, 2023
Available Online: June 04, 2024

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Abstract

Abstract

Due to the complex rheological characteristics of rockfill materials, the existing empirical creep models have problems such as unclear meaning and too many parameters. Based on the remediation project of Hongshiyan landslide dam, the mechanical properties of landslide dam materials are tested. The correlation between the creep strain energy and the compression pressure and stress level in the creep process is analyzed, and the expression for the creep strain energy is obtained. Based on the ROWE stress dilatancy relationship considering the energy dissipation of particle breakage and the inference that the tangential volume ratio remains constant in the creep process, the expressions for the final volumetric strain and deviatoric strain are derived, and the established model can reflect the mechanism of creep deformation of rockfill materials. The analysis results of other rockfill materials such as granite rockfill, breccia rockfill and sand gravel show that the proposed creep model is universal.
- rockfill,
- particle breakage,
- creep model,
- breakage energy consumption,
- dilatancy relationship

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References

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