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The steel-type breakwater has the merits of structural simplicity and passing the long period wave for beach accretion. So, it has been expected to be a key tool for the strategic beach protection technology. The design methodology of the steel-type breakwater was published by Kweon et al.(2011), Kwon et al.(2011), Lee et al.(2011). For the analysis of the resistant friction load acting on the pile, Kweon et al. proposed the estimation method of the design up lift force acting on the dual horizontal plate. With a train of regular wave corresponding to the significant one, they integrated the distribution of the biggest pressure at each point. For the verification of the estimation method of the load on the pile, the study is carried out the experiment in a real sea state. Moreover, the construction procedure, the displacement, joint checking and removal possibility of the steel-type breakwater are discussed. The constructed breakwater has the horizontal wave energy dissipator of () and pile diameter of 711 mm, thickness of 12 mm, length of 23.2 m. The construction took about 8 hours for 1 cell composed of 9 piles and 1 horizontal dual plate. There is a little vertical and horizontal displacement of pile attacked by the maximum wave height of 5.83 m. The removal of 1 cell took about 2 days. This study shows the merits of the easier design, faster construction and simpler removal of the steel-type breakwater. The structure could be estimated as a stable one because it has the horizontal dissipator on which acting a little compression and a little uplift force due to the perforated holes. Moreover, the easier removal could make it possible to manage the coastal line as depending on the conditions of erosion or accretion sand volume. |
