Page 293 - Buried Pipe Design
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264 Chapter Five
Reinforced concrete noncylinder pipe
This type of concrete pipe is manufactured by positioning one or more
steel cages in proper radial location(s) (Fig. 5.8). The cages are placed
between two vertical forms, and the concrete is cast. Alternately, the
cages are attached to an outer form, the entire assembly is rotated,
and the concrete is cast centrifugally. AWWA C302 outlines a design
procedure for internal pressure and external loads acting simultane-
ously. Reinforced noncylinder pipe is available in diameters of 12
through 144 in.
Circumferential Steel Reinforcement Mortared in Field
Longitudinal Steel Bell Ring
Reinforcement
Spigot Ring
Rubber Gasket
Inside Diameter Mortared in Field
(a)
Longitudinal Steel Reinforcement
Circumferential Steel Reinforcement
Inside Diameter
Rubber Gasket
(b)
Figure 5.8 Wall cross section of reinforced concrete noncylinder pipe
(a) with steel join rings and (b) with concrete bell and spigot.
(Reprinted, by permission, from Bulletin No. 200, United Concrete Pipe
Corporation.)
