Multiple Applications, One Solution for Twin Pipelines Underneath a Major River

摘要

In Spring of 2014, the City of Reading, Pennsylvania needed to upgrade the capacity of 42-inch force main runningrnbeneath the Schuylkill River. Working with Entech Engineers, the city devised a solution with a multi-facetedrnapproach. First, PACT Construction would construct a new 42-inch pipeline beneath the river using the HDDrnmethod. This new pipeline would serve as the new main line.rnThen, the length of the existing 400-ft. steel pipe force main would be rehabilitated using two separate methods andrnserve as a standby tie-in to the system. The pipe required two separate methods due to two 45° bends in the system.rnThe straight portion of the pipeline was rehabilitated using Insituform's RPP™ system. RPP™ is a fiber-reinforcedrncure-in-place pipe (CIPP) liner for pressurized piping systems. The bends were rehabilitated by Fibrwrap®rnConstruction using the Tyfo® product.rnThe Tyfo® system uses a fiber-reinforced polymer (FRP) to provide added structural strength to a variety ofrninfrastructure, including buildings, bridges and pipelines. The combination of multiple applications, including HDD,rnfiber-reinforced CIPP, and FRP provided a structural solution to existing pipeline, and basically doubled therncapacity of the system as a whole.