A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
FLOOD SPILLWAY DEVICE
To provide an emergency flood spillway device capable of stably discharging water by greatly increasing discharge capacity in the event of a great flood.SOLUTION: A flood spillway device (20) for increasing and stably discharging a large amount of surplus water from a dam lake comprises: an inflow portion (21) for inflowing the surplus water; and a discharge pipe portion (30) provided adjacent to the inflow portion (21) for discharging the surplus water. The discharge pipe portion (30) has a siphon portion (33) that exerts a siphon action at an entrance or on the way. An opening (35) connected to the atmosphere is provided in an upper portion of the siphon portion (33). The opening (35) is open from the start of the overflow until the water level rises to a certain level, and has a lid (36) which is closed when the overflow reaches the certain water level.SELECTED DRAWING: Figure 2
【課題】大洪水時において大幅に放流能力を増大し、安定した放流を可能とする非常用洪水吐き装置を提供する。【解決手段】ダム湖の余水を大量かつ安定的に増大放流する洪水吐き装置（20）であって、前記余水を流入させる流入部（21）と、この流入部（21）に隣接して設けられ前記余水を放流する放流管部（30）とを備え、前記放流管部（30）は、入口又は途中に、サイホン作用を発揮するサイホン部（33）を備え、前記サイホン部（33）の上部に大気に繋がる開口（35）を備え、この開口（35）に越流開始から一定の水位上昇までは開かれており、越流が前記一定の水位に達したら閉じられる蓋（36）を備えている。【選択図】図２
FLOOD SPILLWAY DEVICE
To provide an emergency flood spillway device capable of stably discharging water by greatly increasing discharge capacity in the event of a great flood.SOLUTION: A flood spillway device (20) for increasing and stably discharging a large amount of surplus water from a dam lake comprises: an inflow portion (21) for inflowing the surplus water; and a discharge pipe portion (30) provided adjacent to the inflow portion (21) for discharging the surplus water. The discharge pipe portion (30) has a siphon portion (33) that exerts a siphon action at an entrance or on the way. An opening (35) connected to the atmosphere is provided in an upper portion of the siphon portion (33). The opening (35) is open from the start of the overflow until the water level rises to a certain level, and has a lid (36) which is closed when the overflow reaches the certain water level.SELECTED DRAWING: Figure 2
【課題】大洪水時において大幅に放流能力を増大し、安定した放流を可能とする非常用洪水吐き装置を提供する。【解決手段】ダム湖の余水を大量かつ安定的に増大放流する洪水吐き装置（20）であって、前記余水を流入させる流入部（21）と、この流入部（21）に隣接して設けられ前記余水を放流する放流管部（30）とを備え、前記放流管部（30）は、入口又は途中に、サイホン作用を発揮するサイホン部（33）を備え、前記サイホン部（33）の上部に大気に繋がる開口（35）を備え、この開口（35）に越流開始から一定の水位上昇までは開かれており、越流が前記一定の水位に達したら閉じられる蓋（36）を備えている。【選択図】図２
FLOOD SPILLWAY DEVICE
洪水吐き装置
KAWASAKI HIDEAKI (author) / NOZUKA TAKASHI (author)
2023-03-13
Patent
Electronic Resource
Japanese
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
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