Sand, water and a rock in between : scour around gravity anchors astride pipelines

Xu Zhao

    Research output: ThesisDoctoral Thesis

    321 Downloads (Pure)

    Abstract

    [Truncated abstract] Gravity anchors (hereafter referred to as GAs) are arch-shaped or cable-clip-resembling precast concrete blocks placed at intervals astride subsea pipelines as an innovative and cost-effective secondary stabilisation strategy. Bottom-seated and free-settling on the seabed however, GAs can suffer from the undermining scour process (i.e. sediment erosion caused by the presence of structures themselves) around their base, resulting in their subsidence towards the pipe and thereby imposing integrity risks on pipeline operation. Scour around the specific subsea structure of GAs has been a very little researched area, and this thesis endeavours to make original contribution to knowledge with the following chapters. Note that each main-body chapter (2–5) adopts a paper format, and contains a literature review on the specific topic it deals with.

    Original languageEnglish
    QualificationDoctor of Philosophy
    Publication statusUnpublished - 2014

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