To provide a marine support having a function of circulating seawater, without limitation on an installation location, at a lower cost than that of a caisson or the like.
The cylindrical marine support 1 for a harbor floating structure is formed of an upper support 2, a lower support 3, a discontinuous section 4 which is fitted into the upper support 2 and the lower support 3 for forming an opening between both the supports 2, 3, in order to flow seawater into the lower support 3; and an umbrella attachment 5 which is attached to an upper wall peripheral portion of the lower support 3 so as to be vertically movable by its buoyancy, according to a sea level. The lower support 3 has exhaust ports 3a formed in a lower wall surface thereof at predetermined circumferential intervals, and the umbrella attachment 5 has sliding portions or rolling portions on an inner peripheral surface thereof, that is opposed to the upper wall peripheral portion of the lower support 3. Thus waves overtop or run up the umbrella attachment, and seawater enters the lower support via the opening formed in the discontinuous section to be discharged from the exhaust ports, which brings about vertical circulation of the seawater, to thereby prevent oxygen depletion in the vicinity of a sea bottom.
NIISATO HIDEYUKI
Tetsuya Mizogami
Yoshinori Iwahara
Susumu Yamamoto