Revetment useful to line stream bed and assembly of said...

E - Fixed Constructions – 02 – B

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E02B 3/12 (2006.01) E02B 3/14 (2006.01) E02B 5/02 (2006.01)

Patent

CA 2489210

A revetment (10) made wholly or predominantly from concrete, useful to line a stream bed, having upper and lower surfaces (20, 30), and having upstream and downstream edges (50, 40), has, for each upstream edge, an upstream bevel (60), which intersects the upper surface and which intersects said upstream edge. The revetment has an array of holes (70) extending between the upper and lower surfaces. Each hole has a lateral wall (74) flaring outwardly in a downstream direction from a circular mouth (72) at the lower wall to an elongate mouth (76) at the upper wall. Each upstream or downstream edge is stepped so as to define an upper or lower flange (42, 52). In an assembly of such revetments, which may be connected to one another, as by cables (14), each of at least some of the upper flanges overlies one of the lower flanges.

L'invention concerne un revêtement (10) entièrement ou essentiellement à base de béton, s'utilisant pour garnir le lit de cours d'eau, présentant des surfaces supérieures et inférieures (20, 30), ainsi que des bords amont et aval (50, 40). Pour chaque bord amont, ledit revêtement comporte un biseau amont (60) qui coupe la surface supérieure et le bord amont. Ledit revêtement présente une matrice de perforations (70) s'étendant entre les surfaces supérieures et inférieures. Chaque trou présente une paroi latérale (74) évasée vers l'extérieur dans un sens aval en partant d'une embouchure circulaire (72) au niveau de la paroi inférieure, jusqu'à une embouchure allongée (76) au niveau de la paroi supérieure. Chaque bord amont ou aval est étagé de manière à définir un flasque supérieur ou inférieur (42, 52). Dans un système assemblé de revêtements de ce type, qui peuvent être reliés les uns aux autres, comme par des câbles (14), chacun d'au moins certains des flasques supérieurs recouvre un des flasques inférieurs.

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