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    Combined bearing capacity of bucket foundations in soft-over-stiff clay

    Access Status
    Fulltext not available
    Authors
    Xia, Huxi
    Zhou, Mi
    Niu, Fujun
    Zhang, Xihong
    Tian, Yinghui
    Date
    2022
    Type
    Journal Article
    
    Metadata
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    Citation
    Xia, H. and Zhou, M. and Niu, F. and Zhang, X. and Tian, Y. 2022. Combined bearing capacity of bucket foundations in soft-over-stiff clay. Applied Ocean Research. 126: 103299.
    Source Title
    Applied Ocean Research
    DOI
    10.1016/j.apor.2022.103299
    ISSN
    0141-1187
    Faculty
    Faculty of Science and Engineering
    School
    School of Civil and Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/89084
    Collection
    • Curtin Research Publications
    Abstract

    In this study, a series of three-dimensional small-strain analyses are carried out to explore the combined capacity of bucket foundations in soft-over-stiff clay under general loading. It aims to provide a supplement to existing design codes. Numerical models are generated and validated with existing data in open literature, where good agreements are obtained. The effects of the layered deposit are explored, including the thickness of the upper soft clay, the length of skirt, the magnitude of the vertical load, and soil properties. Due to the presence of soft clay, the uniaxial bearing capacities reduce significantly, reaching as low as 25% reduction compared to the caisson in uniform stiff clay. In the V-H, V-M and V-H-M spaces, the failure envelopes are normalized in unique shapes according to the geometry of the bucket. Based on the numerical results, an empirical design procedure is proposed to evaluate the failure envelopes of bucket foundations subjected to complex loading conditions in soft-over-stiff clay.

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