Logistic model for isotropic consolidation curve of soils

ZHOU Feng-xi; SHAO Yan-ping; MUSA Abdallah Ibrahim Ahmed

doi:10.11779/CJGE202005021

Volume 42 Issue 5

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Chinese Journal of Geotechnical Engineering > 2020 > 42(5): 976-980. > DOI: 10.11779/CJGE202005021

ZHOU Feng-xi, SHAO Yan-ping, MUSA Abdallah Ibrahim Ahmed. Logistic model for isotropic consolidation curve of soils[J]. Chinese Journal of Geotechnical Engineering, 2020, 42(5): 976-980. DOI: 10.11779/CJGE202005021

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Logistic model for isotropic consolidation curve of soils

1.
School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China
2.
Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China

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Received Date: June 11, 2019
Available Online: December 07, 2022

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Abstract

Abstract

Based on the isotropic compression tests on unsaturated soils and the Logistic function, a model for isotropic consolidation curve of soils is proposed. Firstly, the shortcomings of the single-logarithmic and double-logarithmic linear models commonly used in the volumetric behavior are analyzed. Then, with the Logistic function, the mathematical model between void ratio and pressure under isotropic compression conditions is established. The determination method for every parameter in the model and the analytical expression of the pre-consolidation pressure are given. Finally, the validity of the model is verified by comparison with the existing experimental data, and the influence of suction on each model parameter is analyzed.
- isotropic compression curve,
- unsaturated soil,
- Logistic function,
- pre-consolidation pressure

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References

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