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A Critical Evaluation of Bridge Scour for Michigan Specific Conditions

A Critical Evaluation of Bridge Scour for Michigan Specific Conditions. A presentation to MDOT TAG by Lawrence Tech University & Wayne State University July 30, 2008. Agenda. Project Overview Site Selection Process Equipment Data Acquisition Modeling Questions. Project Goals.

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A Critical Evaluation of Bridge Scour for Michigan Specific Conditions

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  1. A Critical Evaluation of Bridge Scour for Michigan Specific Conditions A presentation to MDOT TAG by Lawrence Tech University & Wayne State University July 30, 2008

  2. Agenda • Project Overview • Site Selection Process • Equipment • Data Acquisition • Modeling • Questions

  3. Project Goals • The objective of this research is to improve the MDOT bridge scour prediction capability. This will be accomplished by calibrating and/or modifying level 2 (HEC-18) scour prediction equations for Michigan specific conditions. • The research plan consists of: • Literature Review • Evaluate MDOT’s Current Scour Evaluation Procedures • Review Scour Evaluation Methods Utilized by Other States • Calibrate Level 2 (HEC-18) Scour Prediction Equations for Michigan Specific Conditions

  4. Project Goals

  5. Project Goals

  6. Timeline

  7. Criteria for Selection • Bridges on the Scour Critical List - State and County Trunk lines • Location • spread through multiple watersheds • access and ease of monitoring • proximity to flow data • Soil Conditions - cohesive • Presence of scour counter measures

  8. ScourCritical List

  9. Bridges Visited

  10. Selected Sites

  11. Selected Sites • Bay Region = 3 Locations • Bad River @ M-52 • Flint River @ M-15 • Pine River @ Lumberjack Road • Grand Region = 2 Locations • Rogue River @ US-131 • Rogue River @ Edgerton Road

  12. Selected Sites • Southwest Region = 4 Locations • Thornapple River @ M-43 • Thornapple River @ Hastings • Kalamazoo River @ I-194 • Kalamazoo River @ M-89 • University Region = 4 Locations • Battle Creek River @ M-78 • Grand River @ M-99 • Black Creek @ Treat Highway • River Raisin near Adrian

  13. Flint River M-15 Bay Region

  14. Bad River M-52 Bay Region

  15. Pine River LumberJack Road Bay Region

  16. Rogue River US-131 Grand Region

  17. Rogue River Edgerton road Grand Region

  18. Kalamazoo River M-89 Southwest Region

  19. Kalamazoo River I-194 Southwest Region

  20. Thornapple River M-43 Southwest Region

  21. Thornapple River McKeown Road Southwest Region

  22. Grand River M-99 University Region

  23. Battle Creek River M-78 University Region

  24. Black Creek Treat Highway University Region

  25. River Raisin Adrian USGS Site University Region

  26. Instrumentation • Continuous Monitoring • Episodic Monitoring • Scour Chains • Jet Scour

  27. Continuous Monitoring

  28. Episodic Monitoring

  29. Scour Chains

  30. Jet Scour

  31. Analysis • Databases • National Bridge Scour Database • Regional Bridge Scour Information • Froelich Paper • Re-parameterization using the NBSDB • HEC-RAS • Exploring data requirements • Holtschlag & Miller

  32. Questions?

  33. Questions For MDOT • Feedback on Bridges Selected • Database Information • Level2 Data • HEC-RAS runs for sites selected • Michigan Specific Conditions (Cohesive vs. Non-Cohesive)

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