Delivering Major Minnesota Bridges Hastings Bridge Design Build Project - PowerPoint PPT Presentation

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Delivering Major Minnesota Bridges Hastings Bridge Design Build Project

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  1. Vincent Gastoni, PE March 5, 2013 Delivering Major Minnesota Bridges Hastings Bridge Design Build Project Redundancy and Service Life MnDOT – ACEC/MN Annual Conference Leading Together- Innovative Solutions for an Evolving Industry

  2. Project Location Map Base Map Source: Google Maps

  3. Project Overview - Existing Bridge • Highway 61 over Mississippi River • Highest daily two-lane highway traffic volume in the state • MnDOT Chapter 152 Bridge • Project replaces 1950 steel arch truss • Lowest 1% in the state for overall sufficiency

  4. Project Overview - Aerial Plan

  5. Project Overview - Design-Build Process Design-Build SOQ Issued: October 2009 Design Build Selection: June 2010 MnDOT identified two acceptable alternatives RFP allowed Alternative Technical Concepts (ATC’s) Design Build Team:

  6. Project Overview - Design-Build Process INNOVATIVE RFP FEATURES • Alternative Technical Concepts (ATC’s) • Allow innovation and flexibility • Pre Approved Elements (PAE) • Reduce risk and provide best value opportunities • Redundancy Concepts for the Main Structure Segment • Scour Analysis Method • Bridge Fixity and Thermal Expansion of Bridge No. 19004 • Refined Analysis Method

  7. Project Overview - Design-Build Process TECHNICAL PROPOSAL SCORING Bridge 34 Points Environmental Management 6 Points Maintenance of Traffic 5 Points Public Communications 2 Points Schedule 3 Points

  8. Project Overview - Design-Build Process TECHNICAL PROPOSAL SCORING • Bridge 34 Points • Durability/Quality of Bridge No. 19004 13 Points • Inspection/Maintenance 9 Points • Geotechnical 5 Points • Erection of Bridge No. 19004 4 Points • Demolition of Bridge No. 5895 3 Points

  9. Project Overview - Design-Build Process • Bid Price Technical Score SCORING DRIVES INNOVATION Selection =

  10. Project Overview - Design-Build Process • Bid Price Technical Score • Minimize Bid Price Maximize Technical Score SCORING DRIVES INNOVATION Selection = Win Strategy=

  11. Project Overview - Design-Build Process • Bid Price Technical Score • Minimize Bid Price Maximize Technical Score Need A Better Mouse Trap SCORING DRIVES INNOVATION • Selection = • Win Strategy= • Use innovative ATC’s & PAE’s to: • Minimize Risks • Optimize Design Solution

  12. Design-Build Process – Base Concepts MnDOT RFP Baseline Options

  13. Design-Build Process – Base Concepts MnDOT Cable Stayed Option

  14. Design-Build Process – Base Concepts MnDOT Arch Option

  15. Base Concept Evaluation • Evaluate Base Designs • Preliminary engineering analysis • Cost estimating exercises • Produce Comprehensive Evaluation Matrix Tool • Material costs & risks • Develop Alternative Designs

  16. Innovation – Develop Alternatives • Evaluate Alternative Designs • Prescriptive design/performance criteria • Aesthetic requirements • Technical scoring criteria • Cost & schedule impacts • Add to Comprehensive Evaluation Matrix Tool • Develop Overall Best Value Technical Approach

  17. Innovation – Develop Alternatives Lunda/Ames-Parsons Alternatives

  18. Innovation – Develop Alternatives

  19. Innovation – Develop Alternatives

  20. Innovative Winning Alternative • Successful Proposal-Free Standing Tied Arch $120M • 545 ft. Main Span Project Architect: Bradley Touchstone, Touchstone Architecture

  21. Innovative Winning Alternative Project Architect: Bradley Touchstone, Touchstone Architecture

  22. Visual Quality Process & Color Selection

  23. Aesthetic Lighting Lighting Design: Illumination Arts

  24. Innovative Features - Concrete Tie • More durable than steel box • No shop assembly and fit-up issues • Active tension control Best value solution Higher level of redundancy Ease of inspection/maintenance

  25. Innovative Features - Concrete Knuckle • Post-tensioned anchorage • Highly redundant Framed into pier and rib Improved durability/fit-up

  26. Innovative Features – Steel Box Arch Rib • Simplified fabrication • Best Value solution Aesthetically pleasing Improved maintenance

  27. Innovative Features - Floor System Redundancy

  28. Innovative Features - Erection

  29. Innovative Features - Erection • Build low TEMP BRACING ARCH RIB FLOOR SYSTEM TEMP TIE & FORMS TEMP LIFTING CONNECTION

  30. Innovative Features - Erection • Build Low On Land TEMP BRACING ARCH RIB FLOOR SYSTEM TEMP TIE & FORMS TEMP LIFTING CONNECTION

  31. Innovative Features - Erection • Build Low On Land

  32. Erection • Move onto Barges Using SPMT’s

  33. Innovative Features - Erection • Move onto Barges Using SPMT’s

  34. Innovative Features - Erection • Float

  35. Innovative Features - Erection • Float

  36. Innovative Features - Erection • Skid

  37. Innovative Features - Erection • Skid

  38. Innovative Features - Erection • Skid

  39. Innovative Features - Erection • Lift

  40. Innovative Features - Erection • Lift

  41. Innovative Features - Erection • Lockoff

  42. Innovative Features - Erection • Get Some Sleep

  43. Other Innovative Features • Column Supported Embankment • Long Span Precast Concrete Beams

  44. Other Innovative Features COLUMN SUPPORTED EMBANKMENT • 4” over 25 years • CSE -10’x10’ Pile Grid • Conc. Caps • Sand/Geogrid

  45. Other Innovative Features • LONG SPAN PRECAST BEAMS • Precast Pretensioned Concrete Beams • 5 Spans of 9-Girder Lines • 173’-7” Long Span • Longest Beam Overall length = 174’-3” • Innovative beam design became the basis of MnDOT’s new MW Long Span Precast Concrete Beam Standards

  46. Other Innovative Features • LONG SPAN PRECAST BEAMS Photos: Joel Mich, Cretex

  47. Other Innovative Features • LONG SPAN PRECAST BEAMS Photos: Joel Mich, Cretex

  48. Other Innovative Features • LONG SPAN PRECAST BEAMS

  49. Summary • Innovative RFP Process • Best Value Approach Drives Innovation • MnDOT Partnering in Innovation • Continued Commitment to Innovation

  50. Thank You