Evaluating CIPP Options for Large-Diameter Sewer Pipe Renewal
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Severely deteriorated large-diameter sewage pipes present special challenges for maintenance and renewal. Cured-in-place pipe (CIPP) and other emerging technologies offer more cost-effective alternatives to digging up and replacing failing pipelines. However, while CIPP has been used for more than 40 years for some applications, its use in large or technically challenging sites has not been extensively evaluated. At the same time, new materials, curing methods and other innovations for CIPP must be evaluated to determine cost-effectiveness, sustainability, and durability.
A wastewater utility in Irving, TX needed to rehabilitate 17,200 feet (5,243 m) of 96-in (2,400 mm) reinforced concrete pipe (RCP) running alongside a river. Both the diameter of the pipe and the length of sections to be restored presented special challenges as did the above-ground obstructions, which include a golf course. Fiber-reinforced CIPP presented a better alternative than traditional open trench replacement. However, before beginning the full project, they came to Battelle for assistance in evaluating alternatives and developing a plan for testing the installed materials. Battelle also served as the lead of a full-scale field evaluation of the feasibility, complexity, performance, cost, and environmental impact of the technology selected.
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