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  • Experimental study on soil response and wave attenuation in a silt bed

    Author(s)
    Tong, Linlong
    Zhang, Jisheng
    Sun, Ke
    Guo, Yakun
    Zheng, Jinhai
    Jeng, Dong-Sheng
    Griffith University Author(s)
    Jeng, Dong-Sheng
    Year published
    2018
    Metadata
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    Abstract
    When ocean waves propagate over porous seabed, they cause variations of the pore pressure within seabed, leading to the possible wave attenuation and soil liquefaction. In order to advance and improve our understanding of the process of wave-induced seabed liquefaction and its impact on wave propagation, systematical experiments are carried out in a wave flume with a soil basin filled with silt. Both the pore pressures and water surface elevations are measured simultaneously, while the seabed liquefaction is videotaped using a high-speed camera. Laboratory measurements show that the pore pressure in surface layer mainly ...
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    When ocean waves propagate over porous seabed, they cause variations of the pore pressure within seabed, leading to the possible wave attenuation and soil liquefaction. In order to advance and improve our understanding of the process of wave-induced seabed liquefaction and its impact on wave propagation, systematical experiments are carried out in a wave flume with a soil basin filled with silt. Both the pore pressures and water surface elevations are measured simultaneously, while the seabed liquefaction is videotaped using a high-speed camera. Laboratory measurements show that the pore pressure in surface layer mainly oscillates over time, while the wave period averaged pore pressure has little change. In the deep layer, however, the wave period averaged value of the pore pressure builds up dramatically. The results show that the wave height decreases rapidly along the direction of wave propagation when seabed liquefaction occurs. Such a wave attenuation is greatly enhanced when the liquefaction depth further increases. The experiments also demonstrate that the conditions (wave height and wave period) of incident waves have significant impacts on the wave-induced pore pressures, liquefaction depth and wave attenuation in a silt bed.
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    Journal Title
    Ocean Engineering
    Volume
    160
    DOI
    https://doi.org/10.1016/j.oceaneng.2018.04.027
    Subject
    Oceanography
    Civil engineering
    Maritime engineering
    Maritime engineering not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/380981
    Collection
    • Journal articles

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