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Effective Repair of Incidental Construction Damage to 54-inch PCCP Line
A water utility located in the Southern US provides water to over 16,000 customers and wastewater service to over 13,000 customers across two counties. In order to serve a growing population, the utility is in the process of upgrading its water treatment plant from 51 MGD to 62 MGD. As a part of the construction process, soil nails were installed for excavation on the property. During the implementation of these soil nails, two 6-inch diameter punctures were made in a 54-inch Prestressed Concrete Cylinder Pipe (PCCP) and 45-degree steel elbow respectively. Given that this pipeline is the main raw water line for the treatment plant, and that the damage occurred during peak summer demand, the need to repair the line was urgent. The proximity of multiple bends and steep slopes adjacent to the distressed regions of the pipelines posed significant challenges for replacement. After extensive research and a site visit to a large municipality pipeline project utilizing similar technology, the utility proposed an internal structural repair using carbon fiber. The owner’s options analysis process, implementation of the bypass system, as well as the internal repair will be detailed in this paper.
Effective Repair of Incidental Construction Damage to 54-inch PCCP Line
A water utility located in the Southern US provides water to over 16,000 customers and wastewater service to over 13,000 customers across two counties. In order to serve a growing population, the utility is in the process of upgrading its water treatment plant from 51 MGD to 62 MGD. As a part of the construction process, soil nails were installed for excavation on the property. During the implementation of these soil nails, two 6-inch diameter punctures were made in a 54-inch Prestressed Concrete Cylinder Pipe (PCCP) and 45-degree steel elbow respectively. Given that this pipeline is the main raw water line for the treatment plant, and that the damage occurred during peak summer demand, the need to repair the line was urgent. The proximity of multiple bends and steep slopes adjacent to the distressed regions of the pipelines posed significant challenges for replacement. After extensive research and a site visit to a large municipality pipeline project utilizing similar technology, the utility proposed an internal structural repair using carbon fiber. The owner’s options analysis process, implementation of the bypass system, as well as the internal repair will be detailed in this paper.
Effective Repair of Incidental Construction Damage to 54-inch PCCP Line
Pridmore, A. B. (author) / Bryant, L. (author) / Le, J. (author)
Pipelines 2015 ; 2015 ; Baltimore, Maryland
Pipelines 2015 ; 1367-1375
2015-08-17
Conference paper
Electronic Resource
English
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