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

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Presentation on theme: "Culverts What is a Culvert? Culvert Components Culvert Design and Construction Culverts – Pros / Cons."— Presentation transcript:

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

2 Culverts What is a Culvert?

3 Culverts 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 Culverts Culvert Components

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

6 Culverts Plan View

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

8 Culverts Culvert Shapes EllipseRound ArchBox

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

10 Culverts Culvert Materials SPCSPCSP CIPPC Plastic WSP

11 Culverts Slide 11

12 Culverts Culvert Material in AT System SPCSP CSP CIP PC Plastic WSP

13 Culverts Culvert Size in AT System

14 Culverts Culvert Age in AT System

15 Culverts Culvert Design and Construction

16 Culverts Soil Steel Structures – No backfill

17 Culverts Soil Steel Structures – Compacted backfill

18 Culverts Wide, Low Cover Acts like Bridge Costs like Bridge

19 Culverts Pipe Arch High Stress Compaction?? Low Resistance Bulging

20 Culverts

21 Open Bottom

22 Culverts

23

24 Base Preparation

25 Culverts NO CAMBER

26 Culverts Assembly – Side Plates

27 Culverts Assembly – Roof Plates Check DimensionsControl Shape

28 Culverts Backfill - Haunch

29 Culverts Backfill - Sides

30 Culverts Concrete End Treatment

31 Culverts Culvert – Pros / Cons

32 Culverts Cost Culvert = $1000/m2 * pi * L * D Bridge = $4000/m2 * L * W CulvertBridgeRatio DLCostLW , , , , , , , ,

33 Culverts Bridge Preferential Icing

34 Culverts Bridge Barriers

35 Culverts Unstable Valley Walls

36 Culverts Need Soil Support

37 Culverts Channel Work

38 Culverts Blockage - Drift/Icing

39 Culverts ProsCons CostNeed Soil Support Preferential IcingChannel Work No BarriersDrift, Icing Unstable Valleys 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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