Differential description of basic mechanical properties of different soils

YAO Yangping; ZHU Binglong; LIU lin

doi:10.11779/CJGE20220083

Volume 45 Issue 1

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Chinese Journal of Geotechnical Engineering > 2023 > 45(1): 33-46. > DOI: 10.11779/CJGE20220083

YAO Yangping, ZHU Binglong, LIU lin. Differential description of basic mechanical properties of different soils[J]. Chinese Journal of Geotechnical Engineering, 2023, 45(1): 33-46. DOI: 10.11779/CJGE20220083

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Differential description of basic mechanical properties of different soils

1.
School of Transportation Science and Engineering, Beihang University, Beijing 100191, China
2.
State Key Laboratory of Building Safety and Built Environment, Beijing 100013, China
3.
Institute of Foundation Engineering, China Academy of Building Research Co., Ltd., Beijing 100013, China

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Received Date: January 16, 2022
Available Online: February 03, 2023
Published Date: January 16, 2022

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Abstract

Abstract

The Compressive hardening, shear dilatancy and friction are the three basic mechanical properties that affect the stress-strain relationship of soils. For different types of soils, there are similarities and differences in the three basic properties. The similarities provide the possibility to establish a unified description for the stress and strain characteristics of various soils, while the differences need to be reflected by adjusting the parameters or constructing the variables in the constitutive model. The unified hardening model (CSUH model) for clays and sands is a typical representative of the unified model. It quantitatively describes the difference in the compressive hardening of different soils by adjusting the compaction hardness parameter p_s. The difference in the shear dilatancy of soils with different densities can be reflected by applying the state parameter ξ in the hardening parameter H. The difference in the strength of soils under different stress Lode angles θ is described by the transformation stress method. By comparing the measured data of several groups of clay, sand and rockfill with the predicted data of CSUH model, the results show that the CSUH model can describe the stress-strain relationship of different kinds of soils with different densities.
- CSUH model,
- basic property of soil,
- difference,
- clay,
- granular soil,
- constitutive model

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References (28)

References

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