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A precast concrete bridge system containing one or more sections wherein each section includes a horizontally disposed, load-bearing span that is integrally cast with a pair of vertical side walls. Each wall contains lightweight cores encapsulated in the concrete to create a series of longitudinally

A precast concrete bridge system containing one or more sections wherein each section includes a horizontally disposed, load-bearing span that is integrally cast with a pair of vertical side walls. Each wall contains lightweight cores encapsulated in the concrete to create a series of longitudinally extended beams in each wall so that the beams in one wall are coaxially aligned with the beams in an adjacent wall. The cores constitute between 16-35 % of the total section volume.

대표청구항 ▼

1. A concrete bridge system that contains a series of precast sections wherein each section further includesa planar horizontally disposed load bearing concrete deck wall, a pair of vertically disposed spaced apart concrete end walls integrally joined to the load bearing deck wall, each of said wall

1. A concrete bridge system that contains a series of precast sections wherein each section further includesa planar horizontally disposed load bearing concrete deck wall, a pair of vertically disposed spaced apart concrete end walls integrally joined to the load bearing deck wall, each of said walls containing a plurality of light weight cores encapsulated therein, the cores in each wall being spaced apart laterally to establish a series of parallel concrete beams that are connected at one end by a first concrete header and at the other end by a second concrete header so that the beams in said side walls are in coplanar alignment with the beams in said deck wall whereby a load exerted on a deck beam is transferred directly to a coplanar aligned beams in each of the side walls, said cores constituting between 16 and 35 percent of the total volume of the section.