| 摘要 |
<P>PROBLEM TO BE SOLVED: To stand up even if a gate body is damaged by passing of a vehicle or collision of a falling object under a falling state and to maintain a standing state even if the gate body in the standing state is damaged by water pressure of tsunami/flood tide. <P>SOLUTION: A self-standing type flood-tide gate 1 is installed in an opening or entrance/exit of a breakwater. When water flows in, a distal end side 2b stands up and fluctuates with a proximal end side 2a as a rotation center (c) within a plane in a height direction with respect to a flowing direction of flowing-in water so as to shut the opening or the entrance/exit. A gate body 2 of the self-standing type flood-tide gate is configured by accommodating side by side hard polyurethane foam column bodies 4 having circular cross sections in tight contact with the inside of the gate body. Since the buoyancy required for standing is generated by hard polyurethane foam, even if the gate body is damaged by a wheel load of a vehicle traveling on the gate body in a falling state, the self-standing type flood-tide gate is allowed to stand up by preventing the buoyancy from being decreased rapidly. Furthermore, even if the gate body is damaged by water pressure of tsunami/flood tide, the standing state can be maintained by preventing the flood-tide gate from falling down. <P>COPYRIGHT: (C)2013,JPO&INPIT |
