Hydraulic energy dissipating offset stepped spillway

E - Fixed Constructions – 02 – B

Patent

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Details

E02B 8/06 (2006.01) E04C 1/00 (2006.01)

Patent

CA 2331093

A spillway (10) for use in a sloped embankment (12) which defines a top (1it) and a toe (16). The spillway (10) is adapted to dissipate the kinetic energy of water flowing downwardly from the top of the embankment (14) to the toe (16) thereof in a primary flow direction (PF). The spillway (10) comprises a plurality of building blocks (18, 20) arranged in rows which are stacked upon each other in a single-like overlap such that the building blocks (18, ) of each row are offset relative to the building blocks (18, 20) of each adjacent row and a series of steps are defined thereby. The building blocks (18, 20) are sized and configured such that water cascading down the steps defined thereby is caused to flow in three dimensions so as to impart velocity components to the falling water that act at generally right angles relative to the primary flow direction (PF) and generate turbulence which dissipates the kinetic energy of the water.

L'invention concerne un déversoir (10) pour levée de terre en pente (12) définissant un sommet (14) et une base (16). Le déversoir (10) est conçu pour dissiper l'énergie cinétique de l'eau qui s'écoule du sommet (14) vers la base (18) de la levée, selon une direction de flux primaire. Le déversoir (10) comprend plusieurs blocs de maçonnerie (18, 20) disposés en rangées, empilés comme des bardeaux pour se chevaucher de sorte que les blocs (18, 20) de chaque rangée soient décalés par rapport aux blocs (18, 20) de chaque rangée adjacente et définissant ainsi une série de gradins. Les blocs (18, 20) ont une taille et une configuration qui entraînent la formation d'une cascade d'eau le long des gradins, avec un écoulement selon trois dimensions conférant à l'eau des composantes de vitesse qui forment des angles généralement droits par rapport à la direction de flux primaire et qui engendrent des turbulences dissipant l'énergie cinétique de l'eau.

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