Lined manhole assembly and liner

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