Accelerated Bridge Construction

The finished bridge demonstrates the possibilities that precast concrete can create. The Precast/Prestressed Concrete Institute recently credited the project for its construction technique, which “capitalized on innovative precast concrete accelerated bridge construction techniques that allowed for high strength, thinner bridge sections and reduced delays and lane closures.”

Panels were aligned so the pockets were set over vertical headed anchor studs from the top flange of the I-beams below. Rebar extending horizontally out of the edges had to be staggered such that it did not interfere with the overlapping bars from adjacent panels. Panels also included cast-in inserts with leveling bolts for vertical adjustability. Ductal ultra-high performance concrete was used to fill the pockets and joints to ultimately create a composite section.

The construction included 15,272 square feet of 8-inch precast deck panels that were set transverse to the main longitudinal I-beams in just four working days. Using precast allowed the underlying deck to be assembled in days, compared to a longer traditional cast-in-place construction project, where forming and curing will increase the onsite duration. By manufacturing the precast at the plant and delivering it to the site, UCP played a crucial role to construct the bridge swiftly and decrease traffic disruption.

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