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- W658431036 abstract "The Washington Suburban Sanitary Sewer Commission (WSSC), which serves the Maryland suburbs of Washington, D.C., is one of the largest water and wastewater utilities in the United States. The WSSC maintains more than 5,500 miles of fresh water pipeline and nearly 5,400 miles of sewer pipeline. This article highlights how the WSSC is using the trenchless pipe replacement method of pipe bursting. With pipe bursting, contractors can burst water and sewer mains under congested or sensitive areas with minimal disruption of the surface. Pipe bursting is more cost-effective than an open-trench installation under asphalt or landscaped areas at any depth. Regardless of surface materials or conditions, pipe bursting also is more affordable than open-trench any time the depth requires trench safety devices. Pipe bursting also requires less excavation or disruption of landscaping than open-trench. The pipe bursting installation method uses hydraulically powered machinery to split the existing pipe with a specially designed cutter head while simultaneously pulling new pipe back through the annular space previously occupied by the original pipe. An expander head can be added to the pull string directly behind the cutter and immediately ahead of the new pipe string to allow the annular space to be increased during pull back. This forces the original pipe fragments out into surrounding soil to make room for the larger-diameter new pipe being pulled in behind it. WSSC uses a restrained-joint polyvinyl chloride (PVC) replacement sewer pipe that decreases disturbance to surrounding areas and that can be quickly and easily assembled as pipe pullback continues. About 1,500 feet of restrained-joint PVC sewer pipe has been successfully installed in three WSSC projects, and more is planned for the future." @default.
- W658431036 created "2016-06-24" @default.
- W658431036 creator A5082516906 @default.
- W658431036 date "2012-06-01" @default.
- W658431036 modified "2023-09-24" @default.
- W658431036 title "A Smaller Footprint for Pipe Replacement" @default.
- W658431036 hasPublicationYear "2012" @default.
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