Method of repairing a manhole chimney using a stretchable...

E - Fixed Constructions – 02 – D

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E02D 29/12 (2006.01)

Patent

CA 2627532

A method of repairing and renewing a manhole chimney 18 utilizes a circumferentially stretchable liner sleeve 30 which is inserted into the manhole and pressed by an inflatable bladder 58 into engagement with the walls of the manhole chimney. The sleeve is coated with an uncured resin, which is allowed to cure as the sleeve is pressed against the chimney walls, thereby attaching the sleeve to the walls of the manhole chimney. The stretchable sleeve eliminates air spaced between the sleeve and the chimney walls, and precludes formation of undesirable folds in the sleeve. The sleeve stretches circumferetially up to 150% of its unstretched diameter, while having a substantially unstretchable length.

L'invention concerne un procédé de réparation et de rénovation d'une cheminée de visite 18 qui utilise une gaine 30 de revêtement intérieur étirable circonférentiellement qui est insérée dans le trou de visite et pressée contre les parois de la cheminée de visite par une vessie gonflable 58 de façon à venir en contact avec celles-ci. Selon l'invention, la gaine est enduite d'une résine non polymérisée, et la polymérisation s'effectue au fur et à mesure que la gaine est pressée contre les parois de la cheminée, plaquant ainsi la gaine contre les parois de la cheminée de visite. La gaine étirable de la présente invention élimine les bulles d'air entre la gaine et les parois de la cheminée, et prévient la formation de plis indésirables dans la gaine. La gaine s'étire au niveau de sa circonférence dans une proportion allant jusqu'à 150 % de son diamètre non étiré, tout en ayant une longueur sensiblement non étirable.

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