Large Cured-in-Place Pipes with 40% Less Thickness
While expansion work of San Diego International Airport, Insituform’s iPlus® cured-in-place pipe (CIPP) technology, using Vipel® 102NA resin from AOC, helped reducing time and cost of the overall process.
The airport put a terminal over a 96-inch diameter concrete sewer pipeline, but the 25ft underground pipe was not designed for the structural loads that were most likely to emerge as part of the new project. The critical part was to maintain the wall thickness of the new liner under 1.26 inches such that the upgraded pipe’s flow rate could handle present and forthcoming projected volumes. To give appropriate strength to the liners, slip-lining could have added nearly 12-in while the conventional CIPP, an additional 2.07-in.
As an alternative, Insituform Technologies® installed a customized 518-m long fiber-reinforced iPlus® Composite liner, which comprised of carbon fibers. The pipes thus made are strong enough to withstand the new structural loads while keeping wall thickness less than 40 percent as compared to conventional CIPP.
The airport put a terminal over a 96-inch diameter concrete sewer pipeline, but the 25ft underground pipe was not designed for the structural loads that were most likely to emerge as part of the new project. The critical part was to maintain the wall thickness of the new liner under 1.26 inches such that the upgraded pipe’s flow rate could handle present and forthcoming projected volumes. To give appropriate strength to the liners, slip-lining could have added nearly 12-in while the conventional CIPP, an additional 2.07-in.
As an alternative, Insituform Technologies® installed a customized 518-m long fiber-reinforced iPlus® Composite liner, which comprised of carbon fibers. The pipes thus made are strong enough to withstand the new structural loads while keeping wall thickness less than 40 percent as compared to conventional CIPP.
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