DOOR STRUCTURE FOR FLOATING FLAP GATE

摘要

The aim of the present invention lies in making it possible to place a door upright even if the door has been damaged by the impact of a passing vehicle or a falling object while the door is in a collapsed state, and also in making it possible to maintain the upright state even if the upright door is damaged by the pressure of water from a tsunami or storm surge. A door (2) for a floating flap gate (1) is disposed in an opening or an inlet/outlet. When water flows in, a tip-end side (2b) of the door (2) is swung upright about a base-end side (2a), which is the centre of rotation, within a plane in the height direction, in the direction of water flow, in order to shut off the opening or inlet/outlet. The door (2) is formed from hard polyurethane foam (4) in the form of a sheet.