Double-row bottomless marine control structure

摘要

PURPOSE:To increase wave dissipation performance and reduce cost by arranging an offshore structure and a coastal side structure approximately in parallel to a shore line and in two rows, and constructing each structure as a bottomless permeable type. CONSTITUTION:Foundation mounds M and M are formed at a certain distance on a sea-bed foundation approximately in parallel to the shore line of a coast, using riprap or the like. In addition, an offshore structure 12 and a coastal side structure 14 constituted with a permeable bottomless cellular box body 22 are arranged on the mounds M. Then, the height A of the upper edge of the structure 12 is set approximately at a level forcibly dissipating a design wave. On the other hand, the height B of the upper edge 18 of the other structure 14 is set at a level between the aforesaid height A and the limit height exceeded by the design wave. According to the aforesaid construction, the structures 12 and 14 can be economically constructed even at a deep sea area, and efficient wave dissipation can be ensured, so long as the sectional form of the structures 12 and 14 are respectively made rectangular.