Large Diameter Cured-in-Place Pipe Rehabilitation of Twin 90-Inch Culverts in Environmentally Sensitive Area

摘要

Insituform recently upgraded a pair of twin 90-in. equivalent diameter storm culverts near Beckley, West Virginia. The pipelines were located in a sensitive area. A waterfall was located upstream from the pipeline. Water to one pipeline had to be diverted while the other line was rehabbed. A trout stream was located downstream, which required that the contractor build a dam to keep water out of the stream. Each pipeline was approximately 200 ft long and ran directly underneath Interstate 77. The line was rehabbed using cured-in-place pipe (CIPP) to provide a fully structural, 50-year engineered design life. The CIPP was impregnated with resin and installed using an over-the-hole (OTH) method. This paper and presentation will cover project planning and engineering and an overview of the specialized impregnation and installation processes.