Lined manhole assembly and liner

Details Lined manhole assembly and liner Lined manhole assembly and liner

E - Fixed Constructions

02

D

E02D 29/12 (2006.01) B28B 7/04 (2006.01) B28B 7/16 (2006.01) B28B 7/30 (2006.01) B28B 19/00 (2006.01) E02D 31/06 (2006.01) E03F 5/02 (2006.01) F16L 58/10 (2006.01)

Patent

CA 2155838

A plastic liner (200) for protecting a concrete manhole interior surface from corrosion wherein the liner includes provisions for creating a strong interlock between the liner and the interior surfaces. A side of the liner which includes the provisions has a plurality of raised hollow projections (206, 208) with spaced sections. The mechanical lock is created when concrete is poured against the side of the liner with the projections. The concrete at least partially enters the hollow portions (210) and fills the space (222, 224) between the projection sections. The projections (206, 208) also intersect to enhance the mechanical interlock by preventing bulging. Liner sections cover essentially all of the manhole interior surfaces. Forming the liner by rotationally molding the plastic and cutting gaps (214) into the projections (206, 208) is also disclosed.

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