TECHNICAL PAPERS
Apr 1, 2002
Minimum-Risk Bedding for Flexible Drain Pipes
Publication: Journal of Irrigation and Drainage Engineering
Volume 128, Issue 2
Abstract
The soil bedding for nonpressurized buried flexible pipes is critical for minimum-risk performance. Lack of adequate bedding reduces the strength of the pipes by a factor of 2 or more. To compensate, pipes must have high strength, at increased cost, in order to avoid the risk of failure. Structural performance and performance limits are compared for plastic drainpipes with a variety of beddings. Compared to a flat bedding, the risk of failure is greatly reduced by shaping the bedding. Shaped beddings perform essentially as well as full-contact embedment with select granular soil. Tests and analyses show that a 90° V-groove bedding that supports and aligns the pipe performs nearly as well as a 180° form-fit circular groove or a full-contact embedment of select soil. Comparison of beddings is important in the design and installation of drainpipes in order to assure minimum risk of failure.
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References
Parker, J. J., and Willardson, L. S.(1981). “Trench bottom effects on flexible pipe strength.” Trans. ASAE, 24(5), 1188–1190.
Watkins, R. K., and Anderson, L. R. (1999). Structural mechanics of buried pipes, CRC, Boca Raton, Fla., 413.
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Copyright
Copyright © 2002 American Society of Civil Engineers.
History
Received: Jan 29, 2001
Accepted: Jul 27, 2001
Published online: Apr 1, 2002
Published in print: Apr 2002
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Authors
Affiliations
Lyman S. Willardson, F.ASCE
Professor Emeritus, Dept. of Biological and Irrigation Engineering, Utah State Univ., Logan, UT 84322-4105.
Reynold K. Watkins
Professor Emeritus, Dept. of Civil and Environmental Engineering, Utah State Univ., Logan, UT 84322-4110.
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.