METHOD OF REPAIRING A MANHOLE CHIMNEY USING A STRETCHABLE SLEEVE

摘要

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.