Spincast system used to reline corrugated pipe

Problem: The storm system for Royal Palms, the largest subdivision in Atlantic Beach, Florida, is comprised mainly of corrugated metal pipe. When faced with the elements of its coastal environment, including salt, tidal influence and sandy soil, the system developed major problems, such as leaks, corrosion, subsidence and even collapses. After spending $200,000 on spot repairs with no end in sight, Atlantic Beach embarked on a $3.2 million storm sewer rehabilitation project to address their system as a whole. Some pipes could not be excavated and replaced due to the disruption it would cause homeowners and the impact potential settling could have on the houses. Additionally, lining the larger-diameter pipes would have yielded too high a cost.

Solution: Two large elliptical pipes, with cross sections of 40 by 65 inches and 44 by 72 inches, running 106 and 119 feet in length, were rehabilitated using CentriPipe from AP/M Permaform. The spincaster is inserted into failing pipes and withdrawn at a predetermined speed while spincasting a fine-aggregate, fiber-reinforced concrete to form a structural liner.

Result: The pipe was coated with a smooth liner that was 1.75 inches thick at the top and bottom and 1.5 inches thick at the sides. The finished product proved to be a cost-effective solution that is smooth, tightly bonded, structurally sound and has minimal impact on inner diameter and flow. 800/662-6465; www.centripipe.com.

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CIPP utilized to reline pipes below airport

Problem: Lane Aviation, a fixed-base operator at John Glenn Columbus International Airport in Columbus, Ohio, had several sections of belowground pipe that leaked to the point where they were no longer efficient.

Solution: After discovering that pipe replacement can be very time-consuming, expensive and messy, they contacted Flow-Liner Systems for a trenchless pipe lining solution. Using CIPP, the installer successfully lined the pipes by means of the Flow-Liner Inversion System, effectively navigating bends and reinstating branch line connections in only two days.

Result: Lane Aviation was happy to avoid the mess of excavation by utilizing no-dig, environmentally friendly technology. 800/248-0020; www.flow-liner.com.

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UV-light-cured CIPP used to reline sewer below cemetery

Problem: The Metropolitan Sewer District of Greater Cincinnati (MSDGC), through its ongoing preventative maintenance program, encountered a sensitive infrastructure problem — video inspection revealed significant deterioration of a sewer located in an easement running directly under the Calvary Cemetery. Because of the sewer’s location beneath grave sites, excavation was not an option.

Solution: Layne Inliner, the winning bidder and owner of the Inliner STX UV-light-cured CIPP product, rehabilitated approximately 416 feet of 24-inch and 169 feet of 15-inch badly deteriorated vitrified clay pipe. Additionally, one new manhole was installed to provide access to a blind lateral connection. Because the existing sewer was badly offset with numerous turns, Layne performed the rehabilitation in several installations.

Result: The project spanned one week and was completed in August 2016. MSDGC has now expanded its approved trenchless repair methods to include STX UV-light-cured CIPP for future pipe rehabilitation projects. 812/865-3232; www.inlinerstx.com.

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Spray-applied polyurea stops leaks in potable water pipeline

Problem: A 1/2-mile-long section of 78-year-old unlined, steel potable water pipeline in Tacoma, Washington, was damaged after years of service and suffered several serious leaks. Businesses and residences surrounded the pipeline, making excavation and replacement an expensive and impractical option. Tacoma Water required an effective pipeline repair solution and extended-life corrosion control strategy.  

Solution: PipeLiner 5000 11-70 PW spray-applied polyurea lining from Rhino Linings was selected to repair the pipe without the need to excavate and physically replace the pipeline. Specifically designed for potable water applications, it has passed the rigorous testing requirements of the NSF/ANSI-61 Section 5 (2012) potable water standard and is Truesdail Laboratories listed. The 58-inch-I.D. pipeline was first dewatered, patched and cleaned. The lining was spray-applied 350 to 400 mils thick, or almost 3/8 inch, using a robotic spray head designed by the contractor to seal leaks and provide structural support. It can also be applied using high-pressure, 1-to-1 spray equipment.  

Result: The project was completed in four weeks with minimal disturbance to the surrounding businesses and residences. Tacoma Water is pleased with the quick turnaround time, and expects the newly coated pipeline to serve its purpose for a minimum of 50 years. 800/422-2603; www.rhinolinings.com.

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Pipe bursting system used to install new sanitary sewer

Problem: The San Francisco, California, municipal sewer system is old and complicated, and particularly distinguished by being the only combined sewer system in the Bay Area. In May 2016, Empire Engineering of San Francisco hired EPS Inc. to burst 300 lineal feet of 18-inch VCP sanitary sewer and install 18-inch DR17 HDPE at the busy Embarcadero Center, on Sacramento Street between Front and Battery streets.

Solution: EPS elected to perform static pipe bursting (non-pneumatic), because the job required an absolute minimum of disturbance, since work was scheduled during daytime hours in the downtown financial district. Technicians used the M100 pipe bursting system from TRIC Tools, along with a custom bursting head and a modified boom-reel truck. The pipe bursting was performed in two stages over one city block, due to daytime scheduling and a broken pulling cable.

Result: The pipe bursting portion of the project was completed on time and on budget. 888/883-8742; www.trictools.com.