Title:
FLOOD SPILLWAY DEVICE
Document Type and Number:
Japanese Patent JP2023035312
Kind Code:
A
Abstract:
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
Inventors:
KAWASAKI HIDEAKI
NOZUKA TAKASHI
NOZUKA TAKASHI
Application Number:
JP2021142080A
Publication Date:
March 13, 2023
Filing Date:
September 01, 2021
Export Citation:
Assignee:
JAPAN DAM ENG CENTER
NISHI NIPPON GIJUTSU KAIHATSU KK
NISHI NIPPON GIJUTSU KAIHATSU KK
International Classes:
E02B8/06
Attorney, Agent or Firm:
Yoichiro Shimoda
Norimasa Shimoda
Katsuhiko Sumiyoshi
Masanori Takizawa
Norimasa Shimoda
Katsuhiko Sumiyoshi
Masanori Takizawa
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