Utah DOT replaced almost five miles of gutter with an underground drainage system of dual-wall corrugated HDPE pipe manufactured by Advanced Drainage Systems Inc. of Hilliard, Ohio. The pipe meets the American Railway Engineering and Maintenance-of-Way Association (AREMA) Cooper E80 loading requirements and American Association of State Highway and Transportation Officials (AASHTO) LRFD Bridge Design Specifications for Section 12 (buried structures).
Because corrugated HDPE pipe meets AASHTO’s Section 12 LRFD Bridge Design Specifications, traffic on SR-36 in Tooele, Utah, didn’t have to be rerouted during construction. A design procedure for polypropylene, PVC, and HDPE, Section 12 considers the actual failure modes of thermoplastic pipe, such as thrust, wall buckling, and combined strain. Deflection is considered as a service limit, serves as confirmation of the design, and ensures suitable long-term performance.