I-74 Corridor Project Update - Iowa Department of Transportation

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  • I-74 Corridor Project Update - Iowa Department of Transportation

    1. 1. I-74 Corridor Project Update<br />December 6, 2010<br />1<br />
    2. 2. Project Overview<br />2<br />
    3. 3. Arch Span<br />3<br />
    4. 4. 4<br />Arch Span<br />
    5. 5. Arch Span Deck and Hanger Study<br />Steel framing supporting the deck optimized<br />Transverse steel beams tied to concrete deck and spacing decreased from 39’-9” to 26’-6”<br />Longitudinal steel beams tied to transverse beams<br />Improved performance – deck stiffness is increased<br />Cost savings of approximately $3 million due to decreased steel weight<br />Use two cables per hanger to add redundancy.<br />Loads can be carried by one cable per hanger.<br />Designed for total loss of a hanger. <br />5<br />
    6. 6. Arch Span Foundation Study<br />Arch Span Foundation - Spread Footing founded on rock<br />Conventional foundation for Arch / Long Span Structures <br />Minimize potential long term risks/maintenance<br />Arch Span and Approach Span Foundations designed for long term rock scour<br />6<br />
    7. 7. Arch Span<br />7<br />
    8. 8. Elevated Seismic Design Criteria<br />No significant cost penalty for moving from 1,000 year to 2,500 year return period<br />Will use Construction Details for Seismic Zone 3 as opposed to Seismic Zone 1<br />Small price to pay for added seismic resistance for this major structure<br />8<br />
    9. 9. Vessel Collision Forces on Bridge Piers<br />Mass of barge and tow speed are used to calculate energy transferred from barge to pier<br />Tow speed varies from 8 mph to 10 mph<br />Loads due to fully loaded tanker > 5,000 Kips (2,500 Tons)<br />Additionally, all river piers will be designed for vessel collision loads due to a loaded runaway barge<br />9<br />
    10. 10. I-74 Piers<br />10<br />
    11. 11. I-74 Piers<br />11<br />
    12. 12. River Piers<br />12<br />At Normal Pool River Levels<br />
    13. 13. 13<br />River Piers<br />At Flood Stage<br />
    14. 14. 14<br />Viaduct Piers<br />View of Bettendorf Viaduct<br />
    15. 15. 15<br />Viaduct Piers<br />View of Bettendorf Viaduct<br />
    16. 16. Pedestrian Trail / Bike Path<br />16<br />
    17. 17. Pedestrian Railing – River Side<br />17<br />
    18. 18. Pedestrian Railing – Arch Side<br />18<br />
    19. 19. 19<br />Pedestrian Railing - Details<br />
    20. 20. Pedestrian Trail / Bike Path Overlook<br />20<br />
    21. 21. Pedestrian Overlook<br />21<br />
    22. 22. Pedestrian Overlook<br />22<br />
    23. 23. Traffic and Separation Barriers<br />23<br />
    24. 24. Traffic and Separation Barriers<br />24<br />
    25. 25. Suggested Colors and Finishes<br />Arch Rib<br />Structural Steel – painted white<br />Concrete – use of admixtures to “lighten”<br />Steel Girders<br />Exterior of Fascia Girder – painted medium grey<br />Interior Girders – weathering steel<br />Painted either side of piers<br />Railings<br />Traffic Barrier Railing – galvanized (grey color)<br />Pedestrian Railing – natural aluminum <br />25<br />
    26. 26. 26<br />Retaining Walls<br />Cast-in-Place (CIP) Concrete Facing<br />
    27. 27. Retaining Walls<br />27<br />With Variable Ground Surface<br />
    28. 28. Retaining Walls<br />Mechanically Stabilized Earth (MSE)<br />28<br />
    29. 29. 29<br />Retaining Walls<br />With Variable Ground Surface<br />
    30. 30. Noise Abatement Walls<br />30<br />
    31. 31. Overpass Abutment and Traffic Barrier<br />31<br />
    32. 32. 32<br />Overpass Pedestrian Railing<br />
    33. 33. Intelligent Transportation System (ITS) Elements in Current Scope<br />Closed Circuit Television (CCTV) Cameras<br />Video Detection System<br />Side Fire Microwave Radar Sensors<br />Dynamic Message Signs (DMS) <br />Road Weather Information Systems (RWIS)<br />Fiber Optic and Wireless Communications<br />33<br />
    34. 34. ITS Elements Being Considered<br />Bridge Health Monitoring Systems<br />SMART Bridge Systems<br />Bridge Security Monitoring Systems<br />Lane Usage Technology<br />Forward Looking Infrared Camera Systems<br />Automated Work Zone Technology<br />34<br />
    35. 35. Light Poles – I-74 Mainline<br />Pole Finish at Corridor and Viaducts<br />35<br />
    36. 36. Light Poles – Local Road / Arch Span <br />Pole Finish at Arch Span<br />36<br />
    37. 37. Lighting Type<br />Ceramic Discharge Metal Halide <br />To be used in the 53rd Street Interchange Improvements<br />High Pressure Sodium <br />(HPS) - CRI 21-23 <br />DOT Standard<br />Ceramic Discharge Metal Halide <br />(CDMH) - CRI 65-75<br />37<br />
    38. 38. Arch Span Lighting<br />38<br />
    39. 39. Arch Span Lighting<br />39<br />
    40. 40. Possible Aesthetic Lighting for River Spans<br />40<br />
    41. 41. Pedestrian Trail / Bike Path Lighting<br />41<br />
    42. 42. 42<br />Pedestrian Overlook Lighting<br />
    43. 43. Pedestrian Overlook Lighting<br />43<br />
    44. 44. Construction Contracts<br />5 Year Construction Duration<br />Reduced from early estimates of 8 years<br />Minimize inconvenience to motorists<br />Delay impacts to I-74 traffic for as long as possible<br />Contract Determination Considerations<br />Bonding capacity of local contractors<br />Dollar amount of each contract<br />Availability of labor<br />Construction staging<br />Construction efficiencies<br />44<br />
    45. 45. Central and South Section Contracts<br />Total of 12 Construction Contracts<br />4 construction contracts in Illinois<br />Combined roadway and bridge<br />8 construction contracts in Iowa and over River<br />4 bridge contracts<br />4 roadway contracts<br />Various supply/specialty contracts<br />Intelligent Transportation Systems<br />Light poles and luminaires<br />Landscaping<br />Aesthetic features<br />Bridge demolition <br />45<br />
    46. 46. I-74 Corridor Project Update<br />Thank You.<br />46<br />

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