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A platform for research: civil engineering, architecture and urbanism
POLLUTION PREVENTION DEVICE USED IN DREDGING WORK
PROBLEM TO BE SOLVED: To provide a pollution prevention device used in dredging work that inhibits leaking of turbulent sediment outside of a dredging water area, when dredging not only a central part of the dredging water area but also a location near an air curtain, and enabling sediment scattered all over the dredging water area to be gathered and scooped at one location.SOLUTION: A pollution prevention device includes: air bubble ejection means installed at a water bottom near a boundary of a dredging water area, ejecting air bubbles toward inside of the dredging water area, for forming a tubular air curtain underwater along the boundary of the dredging water area; and an annular inclined guide member installed near a water surface at the boundary of the dredging water area, being inclined more inwardly toward the top. By forming the air curtain using the air bubble ejection means, an upward water flow is generated at an outer peripheral part of the dredging water area. When the water flow reaches the water surface, the inclined guide member sequentially leads the water flow inwardly into the dredging water area.SELECTED DRAWING: Figure 1
【課題】浚渫水域の中央部だけでなくエアカーテン付近にて浚渫する際でも、水中に巻き上がった堆積物が浚渫水域の外へ漏れにくく、また浚渫水域の全体に拡散した堆積物を一箇所にまとめて掬い取れる浚渫作業用汚濁防止装置を提供する。【解決手段】浚渫水域の境界の水底に配置され、かつ気泡を浚渫水域内に向かって噴出させることで、水中に前記浚渫水域の境界に筒状のエアカーテンを形成する気泡噴出手段と、浚渫水域の境界の水面付近に配置され、上方に向かうほど徐々に浚渫水域の内方へ向かって傾斜した環状の傾斜ガイド部材とを有する。気泡噴出手段を利用してエアカーテンを形成することで、浚渫水域の外周部で上方向の水の流れが発生し、水の流れが水面付近に達したとき、順次、水の流れを傾斜ガイド部材により浚渫水域の内方へ案内する。【選択図】図１
POLLUTION PREVENTION DEVICE USED IN DREDGING WORK
PROBLEM TO BE SOLVED: To provide a pollution prevention device used in dredging work that inhibits leaking of turbulent sediment outside of a dredging water area, when dredging not only a central part of the dredging water area but also a location near an air curtain, and enabling sediment scattered all over the dredging water area to be gathered and scooped at one location.SOLUTION: A pollution prevention device includes: air bubble ejection means installed at a water bottom near a boundary of a dredging water area, ejecting air bubbles toward inside of the dredging water area, for forming a tubular air curtain underwater along the boundary of the dredging water area; and an annular inclined guide member installed near a water surface at the boundary of the dredging water area, being inclined more inwardly toward the top. By forming the air curtain using the air bubble ejection means, an upward water flow is generated at an outer peripheral part of the dredging water area. When the water flow reaches the water surface, the inclined guide member sequentially leads the water flow inwardly into the dredging water area.SELECTED DRAWING: Figure 1
【課題】浚渫水域の中央部だけでなくエアカーテン付近にて浚渫する際でも、水中に巻き上がった堆積物が浚渫水域の外へ漏れにくく、また浚渫水域の全体に拡散した堆積物を一箇所にまとめて掬い取れる浚渫作業用汚濁防止装置を提供する。【解決手段】浚渫水域の境界の水底に配置され、かつ気泡を浚渫水域内に向かって噴出させることで、水中に前記浚渫水域の境界に筒状のエアカーテンを形成する気泡噴出手段と、浚渫水域の境界の水面付近に配置され、上方に向かうほど徐々に浚渫水域の内方へ向かって傾斜した環状の傾斜ガイド部材とを有する。気泡噴出手段を利用してエアカーテンを形成することで、浚渫水域の外周部で上方向の水の流れが発生し、水の流れが水面付近に達したとき、順次、水の流れを傾斜ガイド部材により浚渫水域の内方へ案内する。【選択図】図１
POLLUTION PREVENTION DEVICE USED IN DREDGING WORK
浚渫作業用汚濁防止装置
DOI MAKOTO (author)
2016-05-12
Patent
Electronic Resource
Japanese
IPC:
E02B
HYDRAULIC ENGINEERING
,
Wasserbau
POLLUTION PREVENTION STRUCTURE AND DRAWING DEVICE FOR DREDGING WORK
| European Patent Office | 2017