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What is a Culvert? Culvert Components Culvert Design and Construction Culverts – Pros / Cons

What is a Culvert? Culvert Components Culvert Design and Construction Culverts – Pros / Cons. What is a Culvert?. CHBDC Buried Structure Bridged Opening – 3m span Design – soil interaction AT Surrounded by Soil Below Road Parallel to Stream >= 1.5m DIA flow area. Culvert Components.

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What is a Culvert? Culvert Components Culvert Design and Construction Culverts – Pros / Cons

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  1. What is a Culvert? • Culvert Components • Culvert Design and Construction • Culverts – Pros / Cons

  2. What is a Culvert?

  3. CHBDC • Buried Structure • Bridged Opening – 3m span • Design – soil interaction • AT • Surrounded by Soil • Below Road • Parallel to Stream • >= 1.5m DIA flow area

  4. Culvert Components

  5. Road Rock Cover Inlet Outlet Bevel End Streambed Invert Barrel Burial (Embedment) Crown (Obvert) Clay Seal Elevation View

  6. Plan View

  7. Road Cover Rise Burial (Embedment) Span XS View Haunch

  8. Culvert Shapes Round Ellipse Arch Box

  9. Culvert Shape in AT System Arch Ellipse Box Arch Box Ellipse Round Round All (~2820) > 1999 (~380)

  10. Culvert Materials CSP SPCSP WSP CIP PC Plastic

  11. Culvert Material in AT System Plastic WSP PC CIP SPCSP CSP

  12. Culvert Size in AT System

  13. Culvert Age in AT System

  14. Culvert Design and Construction

  15. Soil Steel Structures – No backfill

  16. Soil Steel Structures – Compacted backfill

  17. Wide, Low Cover • Acts like Bridge • Costs like Bridge

  18. Pipe Arch • High Stress • Compaction?? • Low Resistance • Bulging

  19. Open Bottom

  20. Base Preparation

  21. NO CAMBER

  22. Assembly – Side Plates

  23. Assembly – Roof Plates Control Shape Check Dimensions

  24. Backfill - Haunch

  25. Backfill - Sides

  26. Concrete End Treatment

  27. Culvert – Pros / Cons

  28. Cost Culvert = $1000/m2 * pi * L * D Bridge = $4000/m2 * L * W

  29. Bridge Preferential Icing

  30. Bridge Barriers

  31. Unstable Valley Walls

  32. Need Soil Support

  33. Channel Work

  34. Blockage - Drift/Icing

  35. Hydraulics, Fish Passage ???? Note: Selection of crossing structure is based on an optimization process involving assessment of a range of options (see Bridge Conceptual Design Guidelines)

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