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US 6,854,928 B2Granted
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 installed within soil, comprising a set of horizontally spaced and substantially vertical precast concrete side wall sections, said side wall sections having upwardly facing support surfaces thereon, concrete support footers separate from said side wall sections and supporting bottom surfaces of said side wall sections and providing for tilting movement of each said side wall section relative to the corresponding said support footer and through a vertical plane, a precast concrete top wall section spanning the space between said side wall sections and having opposite end portions supported by said support surfaces, a precast concrete anchor member rigidly connected to each of said side wall sections and spaced above the corresponding said support footer, and each said anchor member projecting laterally outwardly from the corresponding said sidewall section above the corresponding said support footer and into the soil backfilled against said side wall section to provide for precisely and positively positioning said side wall sections prior to mounting said top wall section on said side wall sections.
A concrete culvert system installed within soil, comprising a set of horizontally spaced and substantially vertical precast concrete side wall sections, said side wall sections having upwardly facing support surfaces thereon, concrete support footers separate from said side wall sections and supporting bottom surfaces of said side wall sections and, providing for tilting movement of each said side wall section relative to the corresponding said support footer and through a vertical plane, a precast concrete top wall section spanning the space between said side wall sections and having opposite end portions supported by said support surfaces, each of said concrete side wall sections having an integral extension portion projecting upwardly substantially above the corresponding said end portion of said top wall section, a precast concrete anchor member rigidly connected to each of said side wall sections and spaced above the corresponding said support footer, and each said anchor member projecting laterally outwardly from the corresponding said side wall section above the corresponding said support footer and into the soil backfilled against said side wall section to provide for precisely and positively positioning said side wall sections prior to mounting said top wall section on said side wall sections.
Dependencies are inferred from the claim text.