SR 3020, Section 250, over Pennsylvania Turnpike (Freedom Road)

SR 3020, Section 250, over Pennsylvania Turnpike (Freedom Road) Overview

Cranberry, PA

GAI, as a consultant to Beech Construction, Inc., completed a value engineering design for a two-span bridge replacement project with oversight and ownership by PennDOT District 10-0. The value engineering concept replaced precast deck-beam modules connected with Ultra High-Performance Concrete (UHPC) joints with a conventional cast-in-place concrete deck slab. The alternate bridge continued to use Accelerated Bridge Construction (ABC) techniques to minimize downtime for the underlying Pennsylvania Turnpike by using beam modules with deck reinforcement placed offsite. GAI’s value engineering concept is estimated to save $550,000, compared to the as-designed structure.

GAI also revised the design and detailing of the precast pier caps and precast abutment caps to conventional cast-in-place concrete construction techniques, since the construction schedule did not necessitate the implementation of precast construction.

Additionally, GAI performed several construction engineering tasks, including design of a temporary shoring system to accommodate the partial width construction phasing. GAI was responsible for the demolition plan for the existing structure, erection plan for the new beam modules in the construction yard and at the bridge site, and the development of a jacking plan to reset the bearings.

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