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  • Constitutive modeling of physical properties of coastal sand during tunneling construction disturbance

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    Author(s)
    Zhu, JF
    Zhao, HY
    Xu, RQ
    Luo, ZY
    Jeng, DS
    Griffith University Author(s)
    Jeng, Dong-Sheng
    Year published
    2021
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    Abstract
    This paper presents a simple but workable constitutive model for the stress–strain relationship of sandy soil during the process of tunneling construction disturbance in coastal cities. The model was developed by linking the parameter K and internal angle ϕ of the Duncan–Chang model with the disturbed degree of sand, in which the effects of the initial void ratio on the strength deformation property of sands are considered using a unified disturbance function based on disturbed state concept theory. Three cases were analyzed to investigate the validity of the proposed constitutive model considering disturbance. After validation, ...
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    This paper presents a simple but workable constitutive model for the stress–strain relationship of sandy soil during the process of tunneling construction disturbance in coastal cities. The model was developed by linking the parameter K and internal angle ϕ of the Duncan–Chang model with the disturbed degree of sand, in which the effects of the initial void ratio on the strength deformation property of sands are considered using a unified disturbance function based on disturbed state concept theory. Three cases were analyzed to investigate the validity of the proposed constitutive model considering disturbance. After validation, the proposed constitutive model was further incorporated into a 3D finite element framework to predict the soil deformation caused by shield construction. It was found that the simulated results agreed well with the analytical solution, indicating that the developed numerical model with proposed constitutive relationship is capable of characterizing the mechanical properties of sand under tunneling construction disturbance.
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    Journal Title
    Journal of Marine Science and Engineering
    Volume
    9
    Issue
    2
    DOI
    https://doi.org/10.3390/jmse9020167
    Copyright Statement
    © The Author(s), 2021. Licensee MDPI, Basel, Switzerland. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
    Subject
    Oceanography
    Fisheries Sciences
    Maritime Engineering
    Publication URI
    http://hdl.handle.net/10072/402963
    Collection
    • Journal articles

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