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    Piecewise-Linear Model for Large-Strain Consolidation with Threshold Hydraulic Gradient

    Source: International Journal of Geomechanics:;2022:;Volume ( 022 ):;issue: 005::page 06022005
    Author:
    Yang Liu
    ,
    Jun-Jie Zheng
    ,
    X. D. Zhao
    ,
    Jia-Tai Lu
    ,
    Zhan-Fang Huang
    DOI: 10.1061/(ASCE)GM.1943-5622.0002350
    Publisher: ASCE
    Abstract: Experimental studies found that water flow in clay might not obey Darcy’s law. In some fine-grained soils, the water flow could occur only when the threshold gradient was exceeded. This study investigates the effects of threshold gradient on the consolidation profile. The well-established model CNDF2 is employed with some modifications. Verification examples demonstrate the accuracy of the numerical simulation in this study. Compared with the existing solution in the literature, modeling results in this study are more reliable because the criterion of seepage is independent of the position of the seepage front. Parametric studies find that the excess pore-water pressure cannot be fully dissipated if there is a threshold gradient. A larger value of normalized threshold hydraulic gradient R will result in a larger value of residual excess pore-water pressure. A permeable bottom boundary can contribute to the dissipation of residual excess pore-water pressure. The final settlement will also be affected by the threshold hydraulic gradient. A larger value of R will lead to a smaller final settlement due to the residual excess pore-water pressure. The average degree of consolidation will not be affected by the threshold hydraulic gradient.
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      Piecewise-Linear Model for Large-Strain Consolidation with Threshold Hydraulic Gradient

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    http://yetl.yabesh.ir/yetl1/handle/yetl/4283484
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    contributor authorYang Liu
    contributor authorJun-Jie Zheng
    contributor authorX. D. Zhao
    contributor authorJia-Tai Lu
    contributor authorZhan-Fang Huang
    date accessioned2022-05-07T21:14:19Z
    date available2022-05-07T21:14:19Z
    date issued2022-5-1
    identifier other(ASCE)GM.1943-5622.0002350.pdf
    identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4283484
    description abstractExperimental studies found that water flow in clay might not obey Darcy’s law. In some fine-grained soils, the water flow could occur only when the threshold gradient was exceeded. This study investigates the effects of threshold gradient on the consolidation profile. The well-established model CNDF2 is employed with some modifications. Verification examples demonstrate the accuracy of the numerical simulation in this study. Compared with the existing solution in the literature, modeling results in this study are more reliable because the criterion of seepage is independent of the position of the seepage front. Parametric studies find that the excess pore-water pressure cannot be fully dissipated if there is a threshold gradient. A larger value of normalized threshold hydraulic gradient R will result in a larger value of residual excess pore-water pressure. A permeable bottom boundary can contribute to the dissipation of residual excess pore-water pressure. The final settlement will also be affected by the threshold hydraulic gradient. A larger value of R will lead to a smaller final settlement due to the residual excess pore-water pressure. The average degree of consolidation will not be affected by the threshold hydraulic gradient.
    publisherASCE
    titlePiecewise-Linear Model for Large-Strain Consolidation with Threshold Hydraulic Gradient
    typeJournal Paper
    journal volume22
    journal issue5
    journal titleInternational Journal of Geomechanics
    identifier doi10.1061/(ASCE)GM.1943-5622.0002350
    journal fristpage06022005
    journal lastpage06022005-7
    page7
    treeInternational Journal of Geomechanics:;2022:;Volume ( 022 ):;issue: 005
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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