Base of a manhole having a canal-bed liner

E - Fixed Constructions – 02 – D

Patent

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Details

E02D 29/14 (2006.01) E02D 29/12 (2006.01) E03F 5/02 (2006.01)

Patent

CA 2277997

A base (12) for a manhole or catch basin structure having an embedded plastic canal-bed liner (10) and a corresponding hood (100). The plastic liner (10) has an annular, outwardly extending flange (30) which becomes embedded in a sidewall of the base (12) to form a unitary structure when the concrete is poured. The liner (10) is not subject to delamination from the canal-bed and includes bosses (60) for additional anchoring to the base. In an alternative preferred embodiment, a seal (42) and seal adapter (44) are provided. The adapter (44), in combination with an integral socket (18) of the canal-bed liner, restrains the seal (42) within a canal-bed sidewall opening (24). This combination also serves to conveniently position the seal at time of casting. The canal-bed liner and hood serve to protect the concrete base and cone of the manhole from corrosive fluids, thus extending the useful life of the manhole structure.

L'invention concerne une base (12) destinée à une structure de regard ou de puisard, comportant une garniture de ravier (10) en plastique intégrée et une coiffe (100) correspondante. La garniture en plastique (10) présente un bord (30) annulaire, s'étendant vers l'extérieur, qui vient s'encastrer dans une paroi latérale de la base (12) pour former une structure unitaire lorsque le béton est coulé. La garniture (10) ne peut pas se séparer du ravier et comprend des protubérances (60) assurant un encrage complémentaire dans la base. Dans une variante préférée, la garniture comporte également un joint (42) et un adaptateur pour joint (44). L'adaptateur (44), conjointement avec une douille (18) ne formant qu'une seule pièce avec la garniture de ravier, retient le joint (42) dans une ouverture (24) de la paroi latérale du ravier. Cette combinaison permet également de positionner commodément le joint au moment de la coulée du béton. La garniture de ravier et sa coiffe servent à protéger la base et le cône en béton du regard contre les fluides corrosifs, ce qui augmente la durée de vie utile de la structure de regard.

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