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    Stability of Nonuniform Large Geotextile-Reinforced Cofferdam under Seepage and Excavation Effects

    Access Status
    Fulltext not available
    Authors
    Lu, Xiaochun
    Luo, Yue
    Ming, Huajun
    Zhou, Mi
    Zhang, Xihong
    Liu, Dingwei
    Date
    2022
    Type
    Journal Article
    
    Metadata
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    Citation
    Lu, X. and Luo, Y. and Ming, H. and Zhou, M. and Zhang, X. and Liu, D. 2022. Stability of Nonuniform Large Geotextile-Reinforced Cofferdam under Seepage and Excavation Effects. International Journal of Geomechanics. 23 (2).
    Source Title
    International Journal of Geomechanics
    DOI
    10.1061/IJGNAI.GMENG-7707
    ISSN
    1532-3641
    Faculty
    Faculty of Science and Engineering
    School
    School of Civil and Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/89762
    Collection
    • Curtin Research Publications
    Abstract

    This paper investigates the failure mechanism of nonuniform large geotextile-reinforced cofferdam under seepage and excavation effects on soft sediments. A numerical model is established and validated with available testing results. Then, parametric studies are carried out to investigate the potential influence factors. This study found that the difference between the upstream and downstream water levels and the excavation depth both have significant influences on the stability of cofferdams, where excavation is the key influence factor affecting the stability of the cofferdam. Numerical results revealed that the safety factor could reduce by about 20% with excavation of about 1.5 m. An empirical equation is proposed for quantitative prediction of the stability of geotextile-reinforced cofferdams. A thorough understanding about the failure mechanisms of cofferdams as well as an empirical formula for predicting the stability is concluded in this study, which could provide engineering guide for flexible foundations reinforced by geotextiles.

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