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Application of a Non-Coaxial Soil Model with an Anisotropic Yield Criterion in Tunnelling
Joint Authors
Fang, Yong
Yuan, Ran
Zhang, Jia-Rong
Cui, Jian
Wang, Wen-Ming
He, Yi
Source
Advances in Materials Science and Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-07-02
Country of Publication
Egypt
No. of Pages
8
Abstract EN
Soil strength isotropy and coaxiality of the principal axes of stress and plastic strain rate tensors are often assumed in modelling the soils around tunnels, in the conventional plastic theory.
However, the complexity of the soil response during the excavation of tunnelling cannot be well exhibited.
In this paper, a recently developed two-dimensional (2D) elastoplastic constitutive model incorporating both soil strength anisotropy and non-coaxiality is firstly reviewed and then implemented in the finite element platform ABAQUS through the user-defined material subroutine (UMAT).
This model is then numerically applied to analyze tunnel excavation problems.
Two case studies, i.e., centrifuge testing and field testing, are carried out and compared with the numerical simulations to investigate the influences of soil anisotropy and non-coaxiality on the stress paths of soils around the tunnel crown and the subsurface settlement induced by tunnel excavations.
The results show that the representative soil elements around tunnel crown experience severe principal stress orientations.
The predictions of normalized subsurface settlement troughs can be improved by considering initial soil strength anisotropy compared to the conventional Mohr–Coulomb model.
A larger value of the non-coaxial coefficient results in a larger magnitude of the maximum vertical displacement.
The normalized subsurface settlement troughs are better improved in the case of centrifuge testing than that of the field testing.
American Psychological Association (APA)
Yuan, Ran& Zhang, Jia-Rong& Cui, Jian& Wang, Wen-Ming& He, Yi& Fang, Yong. 2019. Application of a Non-Coaxial Soil Model with an Anisotropic Yield Criterion in Tunnelling. Advances in Materials Science and Engineering،Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1119533
Modern Language Association (MLA)
Yuan, Ran…[et al.]. Application of a Non-Coaxial Soil Model with an Anisotropic Yield Criterion in Tunnelling. Advances in Materials Science and Engineering No. 2019 (2019), pp.1-8.
https://search.emarefa.net/detail/BIM-1119533
American Medical Association (AMA)
Yuan, Ran& Zhang, Jia-Rong& Cui, Jian& Wang, Wen-Ming& He, Yi& Fang, Yong. Application of a Non-Coaxial Soil Model with an Anisotropic Yield Criterion in Tunnelling. Advances in Materials Science and Engineering. 2019. Vol. 2019, no. 2019, pp.1-8.
https://search.emarefa.net/detail/BIM-1119533
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1119533