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日本建设省为防止海浪浸蚀沙滩,同时保持海浜一带生态平衡,研究建筑“海上复接区域”,代替迄今的防波堤。特点是,只在海水表面部位,建造海域控制长堤,促使海滩波浪平静,又可防止海浜生态系发生变化。具体是在距海岸1至2公里、水深20至30米处,用铁骨、铁筋混凝土立柱,建成桥墩,上接桥架。然后在其上部,固定高3至5米、宽25米、长约30米的,中间形成空洞箱型的混凝土予制大型砌块,互相连接起
In order to prevent the waves from sapping the beach, the Ministry of Construction of Japan studied the ecological balance of the seaside area and studied the construction of a “sea-crossing area” instead of the breakwater so far. The feature is that the control of the long bank on the surface of seawater and the construction of the sea area will promote the waves of the beach calmly and prevent the changes of the coastal ecosystem. Specifically in the 1 to 2 km from the coast, the depth of 20 to 30 meters, with iron, reinforced concrete columns, the construction of piers, on the bridge. Then in its upper part, fixed 3 to 5 meters high, 25 meters wide, about 30 meters long, the middle of the formation of hollow box concrete prefabricated large block, connected to each other