E - Fixed Constructions – 02 – D
Patent
E - Fixed Constructions
02
D
25/70
E02D 29/12 (2006.01) B28B 7/26 (2006.01) E03F 5/02 (2006.01)
Patent
CA 1328731
ABSTRACT OF THE DISCLOSURE There are disclosed apparatus and methods for casting poured concrete liners in manholes or the like wherein a collection of sheet-metal, flanged, arcuate panels is provided which panels can be assembled in belts of gen- erally circular cross-section commencing from the bottom of the manhole to provide a complete form structure for casting a concrete liner with a mini- mum thickness of about three inches and including openings created by sectional cylindrical inserts, all of which can be assembled, then disassem- bled after the concrete liner has set. An extensive variety of panels to accomodate different shapes of manholes includes panels for forming right conical belts, for forming offset conical belts, and for forming wedge-shaped belts to make transitions between vertical and tilted sections of the man- hole. A key-panel for these various belts is provided to prevent capture of the panels by the poured concrete liners which includes a relatively narrow portion with vertical flanges fixed at an angle to one another which angle diverges toward the center of the form structure. The methods in- clude jacking the form structure after a part of the liner has been formed and poured to cause it to fit relative to the manhole and inlet pipes into the manhole, before pouring the remainder of the liner.
609931
Action Products Marketing Corporation
Ridout & Maybee Llp
LandOfFree
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