Method of rehabilitating manholes by custom lining/relining

Details Method of rehabilitating manholes by custom lining/relining Method of rehabilitating manholes by custom lining/relining

1990-01-03

1991-03-26

Corbin, David H.

Hydraulic and earth engineering

Miscellaneous

405133, 405268, E02D 2912

Patent

active

050024388

ABSTRACT:
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.

REFERENCES:
patent: 2484018 (1949-10-01), Crom
patent: 2894539 (1959-07-01), Cook et al.
patent: 3269421 (1966-08-01), Telford et al.
patent: 3672173 (1972-06-01), Paramore et al.
patent: 3708124 (1973-01-01), Kellert
patent: 3774683 (1973-11-01), Smith
patent: 3834433 (1974-09-01), Thompson
patent: 3871583 (1975-03-01), Kellert
patent: 4181484 (1980-01-01), Kostylev et al.
patent: 4245970 (1981-01-01), St Onge
patent: 4325772 (1982-04-01), Suetoshi et al.
patent: 4350548 (1982-09-01), Zenbayashi et al.
patent: 4370113 (1983-01-01), Nakashin
patent: 4386628 (1983-06-01), Lachaux
patent: 4456401 (1984-06-01), Williams
patent: 4601312 (1986-07-01), Parkyn, Sr.
patent: 4602659 (1986-07-01), Parkyn, Sr.
patent: 4678370 (1987-07-01), Allen
patent: 4695188 (1987-09-01), Paulkkinen
patent: 4728223 (1988-03-01), Rice
patent: 4751799 (1988-06-01), Ditcher et al.
patent: 4769077 (1988-09-01), Crocker
patent: 4772327 (1988-09-01), Allemann et al.
patent: 4777905 (1988-10-01), Lona
patent: 4781556 (1988-11-01), Paul
patent: 4796669 (1989-01-01), St. Onge
patent: 4796814 (1989-01-01), Klemm et al.
patent: 4818314 (1989-05-01), Brittain et al.
patent: 4846147 (1989-07-01), Townsend et al.
"ACI Standard Recommended Practice for Shotcreting" (ACI-506-66); American Concrete Institute, 1966, pp. 506-1 to 506-22.
U.S. Dept. of HUD, "Utility Infrastructure Rehabilitation", Nov. 1984, pp. 5-1 to 5-16 and 5-55 to 5-61.

Affiliated with

Also associated with

Rating

Method of rehabilitating manholes by custom lining/relining does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of rehabilitating manholes by custom lining/relining, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of rehabilitating manholes by custom lining/relining will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-613880