| 摘要 |
The present invention relates generally to the field of structural pipe lining for conduit rehabilitation and more specifically, to methods for rehabilitating conduits using structural liners. There is provided a method for rehabilitating a tubular conduit having an inner conduit space and at least one service connection tied into the tubular conduit. A portion of the at least one service connection protrudes into the inner conduit space. A liner is provided for covering the inner surface of the tubular conduit. The liner is made of a flexible material capable of being impregnated with a first curable adhesive resin and has a film made of a material impermeable to liquid bonded onto the inner surface of the liner. Also provided, is a flexible sealing member made of a second curable adhesive resin. The method includes the steps of providing access to the inner conduit space of the tubular conduit and snugly fitting the sealing member onto the protruding portion of the at least one service connection in surrounding relation therewith. The liner is impregnated with the first curable adhesive resin and then inserted into the tubular conduit. Thereafter, the liner is shaped to conform to the inner surface of the tubular conduit with a portion of the liner bearing against the protruding portion of the at least one service connection. The method further includes the step of curing the first curable adhesive resin in the liner and the second curable adhesive resin in the sealing member so as to: (a) initially cause the second curable adhesive resin to deform and to at least partially occupy gaps between the protruding portion of the at least one service connection and the liner and, (b) subsequently cause the first curable adhesive resin and the second curable resin to harden. The liner and the sealing member together form a unitary structure and a seal about the protruding portion of the at least one service connection once the first curable resin and the second curable resin have hardened. Thereafter the service connection is opened from within the inner conduit space.
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