1994-02-22
1996-11-26
Neuder, William P.
Bridges
Deck
Joint
522236, E01D 1902
Patent
active
055772846
ABSTRACT:
An overpass bridge that can be used to replace an existing bridge and provide increased clearance over an existing roadway includes two opposed reinforced concrete edge beams positioned above and on either side of the deck surface. The inside wall of each edge beam is configured as parapet wall. The edge beams and the deck slab are post-tensioned with longitudinal tendons anchored at each end of the bridge. The bridge is built using an aligned series of precast concrete segments extending between the bridge abutments. Each segment has a set of transverse tendons extending from lower portions of one edge beam, through the deck slab, to a lower portion of the opposite edge beam. The bridge can be built in a step-by-step process. First, the segments are precast and longitudinal erection beams are extended between the abutments on which the bridge is to be built. The superstructure segments are transported across longitudinal erection beams to their final positions. When all the segments are in place, longitudinal tendons are installed through the segments, post-tensioned, and anchored at each end in proximity to the abutments. The erection beams are then removed and a wearing surface can be applied.
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