| 摘要 |
A corrugated pipe (2) has a plurality of corrugation structures (10, 12) positioned adjacent one another. The corrugation structures (10, 12) comprise an inner cylindrical wall (22), two annular wall portions (28, 32) that extend outwardly from the inner cylindrical wall (22), and a bowed annular wall portion (40) that is connected to the outer ends (36, 38) of the two annular wall portions (28, 32). The corrugation structure (10, 12) includes a centroid (48, 49) and at least a portion of the inner surface (50) of the bowed wall portion (40) has a radius R1 centered on the centroid (48, 49) and at least a portion of the outer surface (52) of the bowed wall portion (40) has a radius and at least R2 centered on the centroid (48, 49). The cavity (56) defined by the corrugation structure (10, 12) has an inner surface with an inner radius R2 centered on the centroid (48, 49). The cavity (56) defined by the corrugation structure (10, 12) has a inner surface with an inner radius R1, R3 that is equal to or greater than one half the thickness T1of the inner cylindrical wall (22). The profile of the corrugation structure (10, 12) is configured to optimally accept forces caused by backfill soil positioned over the pipe (2). A method of manufacturing a corrugated pipe (2) includes manufacturing a first, a second, and a third corrugated pipe (80, 90, 100) with each pipe having an inner diameter ID and an outer diameter OD. The inner diameter ID is chosen such taht the first pipe (80) can be telescopically inserted into the second pipe (90) and the second pipe (90) can be telescopically inserted into the third pipe (100). A method of shipping a plurality of different diameter pipes is also provided.
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