Abstract: A cast-in-place concrete pipe system comprising at least one outer barrel, at least one inner barrel, at least one reinforcement dowel used to create a reinforcement cage, at least one reinforcement wall separator, at least one coupling ring, at least one fill port, one or more barrel support stands and a concrete mixture that is poured into the fill port to reside in the space between the outer barrel and the inner barrel. The cast-in-place concrete pipe system is designed to create a single pipe unit which is chemically resistant and configurable to numerous underground pipe, manhole and utility system needs.

Abstract: A permanent on-site manhole casting system comprising a top, a main barrel, and a base. Each component consists of a ribbed plastic outer barrel and a ribbed plastic inner barrel with a plurality of plastic tie strips used to connect the said outer and inner barrels. A coupling mechanism consisting of a plastic outer coupling ring and a plastic inner coupling ring is welded to the coupling ends of the top, main barrel and base which connects the top, main barrel and base components. A concrete mixture is poured into the space between the coupled outer and inner barrels where the concrete is then allowed to set and cure and the filled form is then completely buried.

Abstract: A permanent on-site manhole casting system consisting of three basic components (a top, a base and a main barrel) which comprise an outer barrel, an inner barrel, a plurality of tie strips used to connect said outer and inner barrels, a coupling mechanism which connects the three basic components, and a concrete mixture that is poured into the space between the outer and inner barrels and allowed to set and cure is provided. The on-site manhole-casting system is designed to create a single manhole unit which is chemically resistant and configurable to numerous manhole and utility system needs.