Method for making precast concrete meter pit
View Patent ↗A precast concrete meter pit consisting of a plurality of precast concrete hollow elongated cylindrical wall sections in end to end relation to one another is fabricated by utilizing a slip form packerhead apparatus in which the wall sections are formed with an annular slip ring when concrete is injected into the slip form apparatus.
1. A method of fabricating a meter pit, said meter pit comprising elongated precast wall sections of generally cylindrical configuration in end-to-end relation to one another, said pit being made from the steps comprising:
(a) securing a slip ring within a concentric jacket;
(b) positioning a pallet having said concentric jacket attached thereto on a turntable;
(c) lowering a packerhead assembly within said jacket, said packerhead assembly having a concentric rollerhead provided with a trowel, said trowel having a radially inwardly and downwardly inclined lower edge;
(d) injecting concrete into an annular space between said jacket and said rollerhead for downward flow until the space is entirely filled;
(e) raising said rollerhead and trowel as said annular space is being filled followed by removing said jacket; and
(f) removing said slip ring from said wall sections.
2. A method of fabricating a meter pit according to claim 1 wherein said slip ring is of annular configuration with stepped upper and lower surfaces.
3. A method of fabricating a meter pit according to claim 1 wherein a radius of said slip ring is equivalent to a width of said wall sections.
4. A method of fabricating a meter pit according to claim 1 wherein said jacket includes circumferentially spaced bores and radially inwardly projecting upper and lower pin members that are aligned with said spaced bores.
5. A method of fabricating a meter pit according to claim 4 wherein said uppers and lower pin members are secured to circumferentially spaced levers.
6. A method of fabricating a meter pit according to claim 5 wherein said levers are moveable between dual positions.
7. A method of fabricating a meter pit according to claim 1 wherein said wall sections are defined by a first pipe section and a second pipe section.
8. A method of fabricating a meter pit according to claim 7 wherein a lap joint is formed between said first and second pipe sections.
9. A method of fabricating a meter pit, said meter pit comprising a hollow, elongated precast concrete pipe of generally cylindrical configuration having a plurality of wall sections, said pit being made from the steps comprising:
(a) positioning a pallet on a bottom plate and turntable, said pallet having an aligned outer concentric jacket, a slip ring, and an inner concentric rollerhead provided with a trowel having a radially inwardly and downwardly inclined lower edge which defines an inner beveled edge surface of at one end of said pipe;
(b) injecting concrete into an annular space between said jacket and said rollerhead for downward gravity flow until the space is entirely filled to define said pipe with an inner beveled surface at one end;
(c) raising said rollerhead and trowel as said annular space is being filled followed by removing said jacket; and
(d) removing said slip ring.
10. A method of fabricating a meter pit according to claim 9 wherein said jacket includes positioning levers.
11. A method of fabricating a meter pit according to claim 10 wherein said jacket has aligned bores therein adapted to receive pin members secured to said positioning levers.
12. A method of fabricating a meter pit according to claim 10 wherein said slip ring is of annular configuration having ridged surfaces.