Bridge structure with concrete deck having precast slab
AssigneeBot Construction Limited
InventorSteven R. Bot
Life of this patent
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Abstract
A precast concrete slab for forming a deck in a bridge superstructure has a chamfer on forward and trailing edges so that adjacent slabs can mate. The slab is reinforced with bars which protrude laterally from the slab on opposite sides and which, in use, extend over support beams. Selected bars are formed in a castellated shape of which inverted U-shaped portions extend above the surface of the precast concrete slab. Conveniently, the U-shaped portions anchor a concrete topping which is poured over the slabs at a bridge site and also provide locations for hooking a crane used to transport the slab at a site.
Claims16
A precast concrete slab having oppositely disposed operatively upper and lower faces and side walls coupling the upper and lower faces, the side wall adjacent to the upper face being orthogonal thereto and the side wall adjacent to the lower face on two opposite sides of the slab being somewhat recessed to define a chamfer on forward and trailing edges therefor.
A precast concrete slab having a plurality of reinforcement bars disposed within the slab at spaced intervals along its length, the bars having extremities which protrude laterally from the slab on opposite sides thereof.
A precast concrete slab having a plurality of reinforcement bars disposed within the slab at spaced intervals along its length, the reinforcement bars having extremities which protrude laterally from the slab on opposite sides thereof,
- a selected number of said reinforcement bars extending upwardly above an operatively upper face of the slab to define anchors for securing a concrete topping to be poured onto the precast concrete slab,
- the precast concrete slab having an operatively lower face disposed opposite said upper face and side walls coupling the upper and lower faces, the side wall adjacent to the upper face being orthogonal thereto and the side wall adjacent to the lower face on two opposite sides of the slab being somewhat recessed to define a chamfer on forward and trailing edges therefor.
A system for building a bridge superstructure, the system having
- a plurality of support beams extending longitudinally along the length of the bridge, and erected at predetermined spaced locations across the width of the bridge to define a separation, the support beams each having a plurality of beam anchors secured to the support beams;
- screed adjustors provided in pairs for disposing on opposed lateral edges of the support beams;
- precast concrete slabs having a width for spanning said separation between the support beams, the slabs having a plurality of slab reinforcement bars disposed within the slabs at spaced intervals along the lengths of the slabs, the slab reinforcement bars having free extremities which protrude from the slabs on opposite lateral sides thereof, and a selected number of said slab reinforcement bars extending upwardly above an operatively upper surface of the slabs to define slab anchors for securing a concrete topping to be poured onto the precast concrete slabs;
- deck reinforcement bars for coupling the precast concrete slabs to the beam anchors;
- and ties for securing the deck reinforcement bars to the beam anchors and to free extremities of the slab reinforcement bars.
A deck for a bridge superstructure having a plurality of support beams extending longitudinally along the length of the bridge, and erected at predetermined spaced locations across the width of the bridge to define a separation, the support beams each having a plurality of beam anchors secured to the support beams and screed adjustors disposed in pairs on opposed lateral edges of the support beams, the deck having;
- a plurality of precast concrete slabs disposed with forward and trailing edges abutting one another along the length of the associated support beams, the precast concrete slabs having a width for spanning said separation between the support beams, the slabs having a plurality of slab reinforcement bars disposed within the slabs at spaced intervals along the lengths of the slabs, the slab reinforcement bars having free extremities which protrude from the slabs on opposite lateral sides thereof, and a selected number of said slab reinforcement bars extending upwardly above an operatively upper surface of the slabs to define slab anchors for securing a concrete topping formed in situ on the precast concrete slabs;
- deck reinforcement bars coupling the precast concrete slabs to the beam anchors;
- and ties securing the deck reinforcement bars to the beam anchors and to free extremities of the slab reinforcement bars.
Dependencies are inferred from the claim text.