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US 2003/0143029 A1Published application
Precast concrete culvert system
AssigneeCon/Span Bridge Systems Ltd.
InventorWilliam D. Lockwood
Life of this patent
Estimating the term…
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AssigneeCon/Span Bridge Systems Ltd.
InventorWilliam D. Lockwood
Estimating the term…
A three piece concrete culvert system includes a set of horizontally spaced precast side wall sections having inwardly projecting and opposing steps or surfaces which support opposite ends of a precast arched top wall section. The side wall sections include extension portions which project substantially above the ends of the top wall section for increasing the capacity of the side wall sections to resist thrust from the top wall section. Vertically spaced and generally horizontal layers of soil reinforcement members or grids may be positioned within the soil backfilled adjacent the outer surfaces of the side wall sections, and precast concrete anchor members may be attached to the side wall sections above supporting footers for the side wall sections. Shims are used between the footers and the anchor members for temporarily positioning and aligning the side wall sections before receiving the top wall section.
A concrete culvert system adapted to be covered with soil, comprising at least one set of horizontally spaced and generally vertical concrete side wall sections, said side wall sections having inwardly projecting and opposing support surfaces, an arched top wall section spanning the space between said side wall sections and having opposite ends supported by said support surfaces, and at least one of said concrete side wall sections having an integral extension portion projecting upwardly substantially above the corresponding end of said top wall section for substantially increasing the capacity of said one side wall section to resist thrust from said top wall section after soil is backfilled against an outer surface of said one side wall section.
A concrete culvert system adapted to be covered with soil, comprising at least one set of horizontally spaced and generally vertical precast concrete side wall sections, said side wall sections having inwardly projecting and opposing support surfaces, a precast arched top wall section spanning the space between said side wall sections and having opposite ends supported by said support surfaces, said concrete side wall sections each having an integral extension portion projecting upwardly substantially above the corresponding end of said top wall section for substantially increasing the capacity of said one side wall section to resist thrust from said top wall section after soil is backfilled against an outer surfaces of said side wall sections.
A concrete culvert system adapted to be covered with soil, comprising a set of horizontally spaced and generally vertical concrete side wall sections, an arched top wall section spanning the space between said side wall sections and having opposite ends connected to said side wall sections, and a plurality of vertically spaced layers of soil reinforcement members adjacent at least one of said side wall sections and projecting laterally outwardly therefrom for reinforcing backfilled soil adjacent said one side wall section.
Dependencies are inferred from the claim text.