Destabilisation of seawall ground by ocean waves

DOI HANDLE Web Site 39 References Open Access
  • Hidenori Takahashi
    *Formerly, Department of Civil and Environmental Engineering, Imperial College, UK; now Geotechnical Engineering Department, Port and Airport Research Institute, National Institute of Maritime, Port and Aviation Technology, Japan.
  • Lidija Zdravković
    †Department of Civil and Environmental Engineering, Imperial College, UK.
  • Aikaterini Tsiampousi
    ‡Department of Civil and Environmental Engineering, Imperial College, UK.
  • Nobuhito Mori
    §Coastal Disaster Research Section, Disaster Prevention Research Institute, Kyoto University, Japan; also School of Engineering, Swansea University, UK.

Search this article

Description

<jats:p> Seawalls are constructed by covering and protecting the sloping seashore ground with concrete plates or blocks. Their purpose is to sustain high waves induced by strong winds and prevent ground erosion, but they often collapse, mobilising different modes of failure, including that of the ground. Nevertheless, limited research has been conducted on ground failure caused by high waves. In this study, a series of novel centrifuge model tests was first conducted to investigate the failure mechanisms of seawalls due to wave propagation, focusing on the failure of the ground. Finite-element analyses were subsequently conducted to explore the failures observed in the model tests and to provide further insight as to the state of the ground leading to failure. Two failure modes were demonstrated to prevail: floating of the covering panel and sliding failure of the ground. In addition, of the possible causes of failure, the following three were identified in the current study: increased unit weight and reduced suction from wetting; enhanced seepage force under the panel and around the toe block during backwash; water pressure on the back of the panel and the landward side of the toe block during backwash. </jats:p>

Journal

  • Géotechnique

    Géotechnique 74 (8), 713-728, 2024-07-01

    Emerald

References(39)*help

See more

Related Projects

See more

Details 詳細情報について

Report a problem

Back to top