Pipelines 2019
A Modern Solution for an Old Problem—Utilizing both CIPP and CFRP for Aerial Pipeline Rehabilitation
Publication: Pipelines 2019: Condition Assessment, Construction, and Rehabilitation
ABSTRACT
What happens when you determine one rehabilitation technology isn’t sufficient enough? The internal or external rehabilitation of aerial piping can be a tricky concept when utilized as an either/or repair option, but when combined, these technologies can prove to complement one another and provide a fully structural repair solution not previously considered in our industry. For a municipality in North Texas, they are no stranger to this design challenge, but they had never considered the combination of these technologies until it was presented as one design solution procured under one contract. By consulting with their partners, they realized that this problem could be overcome by implementing both an internal and external repair solution. This paper will focus on two aerial pipes, 12-inch and 18-inch steel pipes, which were showing signs of severe deterioration. The design team determined that the pipes would be internally rehabilitated with cured-in-place pipe (CIPP) to eliminate internal corrosion; then, to provide additional protection due to environmental exposure and provide additional longitudinal strength, the use of carbon fiber reinforced polymer (CFRP) systems was designed to be applied to the exterior. This paper will discuss the city’s struggle with this issue and the process that led to this unique repair option. The design procedures and the construction details will also be discussed and illustrated.
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REFERENCES
AWWA (American Waste Water Association). (2017) CFRP Renewal and Strengthening of PCCP, ANSI/AWWA C305. First Edition. AWWA, New York, NY.
ASTM (American Society for Testing and Materials). (2016) Standard Practice for Rehabilitation of Existing Pipelines and Conduits by the Inversion and Curing of a Resin-Impregnated Tube, ASTM F1216-16. Tenth Edition. ASTM International, West Conshohocken, PA.
Information & Authors
Information
Published In
Pipelines 2019: Condition Assessment, Construction, and Rehabilitation
Pages: 8 - 13
Editors: Jeffrey W. Heidrick, Burns & McDonnell and Mark S. Mihm, HDR
ISBN (Online): 978-0-7844-8249-0
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Jul 18, 2019
Published in print: Jul 18, 2019
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