| 摘要 |
<p>The disclosure concerns a fusible shutter for a water structure such as a river sill, or a spillway on a dam or on a protective dyke, including a solid element disposed on the top of the structure and held on top by gravity, forming a watertight or substantially watertight wall, installed on the water structure and being able to retract so as to allow water to pass without obstruction when the level of the reservoir or watercourse reaches a predefined level, a chamber being formed at the base of the solid element between the latter and the surface that supports it, pressurization means enabling the chamber to be filled with water in order to create under the solid element a thrust directed upwards when the water in the reservoir or watercourse reaches the predefined level. The disclosure consists in these pressurization means including a water inlet at a feed structure provided with two compartments delimited by an internal vertical wall, the two compartments being in communication with each other through at least one passage provided at the top part of the feed structure, one of the compartments having one or more openings in its bottom part allowing entry of water from the reservoir or watercourse into the feed structure while the other compartment is in communication with the chamber under the solid element. Applications to water structures such as a river sill, or a spillway on a dam or on a protective dyke.</p> |
