Pennsylvania Department of Transportation [PE]

# 2008 Budapest

A 600mm (24”) corrugated polyethylene pipe was installed under a fill on Interstate 279 north of Pittsburgh, Pennsylvania in the summer of 1987. The pipe was manufactured to meet the current AASHTO M 294-86 specification (1). The total length of pipe installed was 175 m (576 feet), with 61 m (200 feet) meeting Type S, and the remaining 115 m (376 feet) meeting Type C. The maximum height of cover in the center of the fill was over 30.5 m (100 feet). This pipe was inspected in June and October of 2007, nearly 20 years after it was installed. This inspection included visual evaluation, measurements of deflection, shape, and circumferential shortening, measurements of residual stress, removal of samples for determination of existing materials properties, including tensile strength, modulus of elasticity, NCLS, and anti-oxidant protection remaining. This pipe has been the subject of nearly two dozen reports and over 22 inspections, the most recent being 15 years after installation. The 20-Year inspection team was led by Dr. Shad Sargand and Dr. Teruhisa Masada of Ohio University.

Please note that the whole article content is available on PPCA website onlySource : 2008 Budapest


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