Precast concrete culvert system

A concrete culvert assembly comprising a set of elongated footers, a plurality of precast tapered concrete culvert sections mounted on said footers in longitudinal alignment, each of said footers in longitudinal alignment, each of said culvert sections having an open bottom and including parallel spaced vertical side walls having bottom surfaces resting on said footers, an arcuate top wall integrally connected to each of said side walls of each said section, said side walls of each said section having opposing inner surfaces defining a span greater than the length of said side and top walls, said arcuate top wall of each section having a generally uniform thickness with a curved inner surface having a radius of curvature at least twice the rise defined between the top center of said curved inner surface and said bottom surfaces of said side walls, one of said side walls of each said culvert section having a length less than the lenght of the other said side wall to provide for curving said culvert assembly, each of said side walls of each said section having a generally uniform thickness and a generally flat vertical outer surface with a vertical height at least fifty-five percent of said rise and less than fifty percent of said radius of curvature, said concrete top wall of each said section having a curved outer surface forming a relatively sharp corner with said outer surface of each said side wall, reinforcing members embedded in said concrete of each said section and extending generally parallel to said outer surfaces of said top and side walls, and said inner surface of each said side wall and said inner surface of said top wall of each said section being connected by a surface cooperating with said relatively sharp corner to define a corner thickness substantially greater than the thickness of said side and top walls.

A precast concrete assembly adapted to be used as a culvert, comprising a plurality of precast concrete culvert sections mounted on said footers in longitudinal alignment, each of said culvert sections having an open bottom and including parallel spaced vertical side walls having bottom surfaces, an arcuate top wall integrally connected to each of said side walls of each said section, said side walls of each said section having opposing inner surfaces defining a span greater than the length of said side and top walls, said arcuate top wall of each section having a generally uniform thickness in lateral cross-section and a curved inner surface with a radius of curvature at least twice the rise defined between the top center of said curved inner surface and said bottom surfaces of said side walls, each of said side walls of each said section having a generally uniform thickness in lateral cross-section and a generally flat vertical outer surface with a vertical height at least fifty-five percent of said rise and less than fifty percent of said radius of curvature, said concrete top wall of each said section having a curved outer surface forming a relatively sharp corner with said outer surface of each said side wall, said top wall of each section having laterally extending end portions forming ribs with a thickness greater than the thickness of an intermediate portion connecting said end portions to define a recess within said outer surface of said top wall, reinforcing members embedded in said concrete of each said section and extending generally parallel to said outer surfaces of said top and side walls, and said inner surface of each said side wall and said inner surface of said top wall of each said section being connected by a surface cooperating with said relatively sharp corner to define a corner thickness substantially greater than the thickness of said side and top walls.

A concrete assembly adapted to be buried within the ground, comprising a concrete base, a series of precast concrete sections mounted on said base in longitudinal alignment, each of said sections having an open bottom and including a parallel spaced vertical side walls having bottom surfaces resting on said base, an arcuate concrete top wall integrally connected to each of said side walls of each said section, said side walls of each said section having opposing inner surfaces defining a span greater than the length of said side and top walls, said arcuate top wall of each section having a generally uniform thickness with a curved inner surface having a radius of curvature at least twice the rise defined between the top center of said curved inner surface and said bottom surfaces of said side walls, each of said side walls of each said section having a generally uniform thickness and a substantially vertical outer surface with a vertical height at least fifty-five percent of said rise and less than fifty percent of said radius of curvature, said concrete top wall of each said section having a curved outer surface forming a relatively sharp corner with said outer surface of each said side wall, reinforcing members embedded in said concrete of said section, said inner surface of each said side wall and said inner surface of said top wall of each said section being connected by a surface cooperating with said relatively sharp corner to define a corner thickness substantially greater than the thickness of said side and top walls, and two of said sections forming end sections and having integrally cast end walls, whereby said sections cooperate with said base to define an enclosed chamber adapted to receive a fluid.

A concrete culvert assembly comprising a set of parallel spaced elongated footers, a plurality of precast concrete culvert sections mounted on said footers in longitudinal alignment, each of said culvert sections having an open bottom and including parallel spaced vertical side walls having bottom surfaces resting on said footers, an arcuate top wall integrally connected to each of said side walls of each said section, said side walls of each said section having opposing inner surfaces defining a span greater than the length of said side and top walls, said arcuate top wall of each section having a generally uniform thickness with a curved inner surface having a radius of curvature at least twice the rise defined between the top center of said curved inner surface and said bottom surfaces of said side walls, each of said side walls of each said section having a generally uniform thickness and a generally flat vertical outer surface with a vertical height at least fifty-five percent of said rrise and less than fifty percent of said radius of curvature, said concrete top wall of each said section having a curved outer surface forming a relatively sharp corner with said outer surface of each said side wall, said arcuate top wall of each culvert section including connector means located at substantially the top center of said top wall and providing for precasting and transporting each said culvert section in two half-sections, reinforcing members embedded in said concrete of each said section and extending generally parallel to said outer surfaces of said top and side walls, and said inner surface of each said side wall and said inner surface of said top wall of each said section being connected by a surface cooperating with said relatively sharp corner to define a corner thickness substantially greater than the uniform thickness of said side and top walls.