초록 ▼

A method for lining or relining a sewer manhole, apparatus comprising an improved leak resistant manhole, and a cementitious mixture for lining/relining manholes. A homogeneous, monolithic, cementitious liner is spray applied in place within a concrete or brick-and-mortar manhole infrastructure with

A method for lining or relining a sewer manhole, apparatus comprising an improved leak resistant manhole, and a cementitious mixture for lining/relining manholes. A homogeneous, monolithic, cementitious liner is spray applied in place within a concrete or brick-and-mortar manhole infrastructure without forms, webbing, or re-bar. A manhole to be serviced is first located and spray cleaned with water. Loose concrete and mortar fragments of the original structure are forcibly removed. A cementitious mixture is spray-applied to the interior surfaces of the manhole to create a continuous, monolithic interior liner. This lining is configured substantially identically to the internal shape and geometry of the manhole. When the liner sets after installation, a substantially impervious water and chemical resistant barrier prevents manhole ingress/egress by ground water. The preferred cementitious mixture is a lightweight, high silicate, fiber-reinforced blend, which, when mixed with 20% to 40% water by weight and properly spray applied, will produce a monolithic liner having hitherto undiscovered geometric and structural strength characteristics, including improved water impermeability and chemically resistant properties. The disclosed structure and process contribute positively to the promotion of improved sewer system integrity.

대표청구항 ▼

A method of lining/relining manholes to rehabilitate, reinforce and seal them, said method comprising the steps of: (a) locating a manhole to be lined/relined; (b) preparing the interior and interior surfaces of the manhole by cleaning the brick, tile, concrete block and mortar or concrete interior

A method of lining/relining manholes to rehabilitate, reinforce and seal them, said method comprising the steps of: (a) locating a manhole to be lined/relined; (b) preparing the interior and interior surfaces of the manhole by cleaning the brick, tile, concrete block and mortar or concrete interior thereof and removing loose particles of brick, mortar or the like; (c) spraying a monolithic cementitious mixture containing a hydraulic cement about the interior surfaces of the manhole to create a continuous monolithic interior liner formed in place and custom configured at the job site substantially to the internal geometry of the manhole; and, (d) allowing said liner to set, whereby the flexural strength of said manhole is enhanced.