Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Liquefaction of Loosely Deposited Sandbed Behind a Breakwater due to Wave Overtopping
In Port of Kushiro, a breakwater with an artificial shallow reef is now being constructed. This shallow reef will be used for fish and seaweed firm. The reef is filled with loosely deposited dredged sand and covered with armor blocks to prevent scouring by overtopping waves. Because of the strong wave overtopping, the sandbed will be suffered from liquefaction. Suzuki et al. conducted a series of experiments to examine wave-induced liquefaction in a loosely packed fine sandbed. Liquefaction with residual pore pressure occurs due to wave driven shear stress in the sandbed. The compaction of a liquefied sandbed in response to cyclic wave loading was also observed. In a usual seabed, liquefaction with residual pore pressure does not occur because cyclic wave loads compact the sand. On the other hand, the loosely deposited sandbed behind the breakwater is likely liquefied due to wave overtopping after the construction. In order to avoid devastating liquefaction, we conducted a series of experiments in a wave flume. FEM simulation was also conducted in order to evaluate the liquefaction limit.
Liquefaction of Loosely Deposited Sandbed Behind a Breakwater due to Wave Overtopping
In Port of Kushiro, a breakwater with an artificial shallow reef is now being constructed. This shallow reef will be used for fish and seaweed firm. The reef is filled with loosely deposited dredged sand and covered with armor blocks to prevent scouring by overtopping waves. Because of the strong wave overtopping, the sandbed will be suffered from liquefaction. Suzuki et al. conducted a series of experiments to examine wave-induced liquefaction in a loosely packed fine sandbed. Liquefaction with residual pore pressure occurs due to wave driven shear stress in the sandbed. The compaction of a liquefied sandbed in response to cyclic wave loading was also observed. In a usual seabed, liquefaction with residual pore pressure does not occur because cyclic wave loads compact the sand. On the other hand, the loosely deposited sandbed behind the breakwater is likely liquefied due to wave overtopping after the construction. In order to avoid devastating liquefaction, we conducted a series of experiments in a wave flume. FEM simulation was also conducted in order to evaluate the liquefaction limit.
Liquefaction of Loosely Deposited Sandbed Behind a Breakwater due to Wave Overtopping
Suzuki, Kojiro (Autor:in) / Takahashi, Shigeo (Autor:in)
Coastal Structures 2003 ; 2003 ; Portland, Oregon, United States
Coastal Structures 2003 ; 656-662
28.09.2004
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Liquefaction of Loosely Deposited Sandbed Behind a Breakwater due to Wave Overtopping
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