ABCAcceleratedBridgeConstruction-Minnesota.PDFVIP

MnDOT Bridge Office LRFD Workshop – June 12, 2012 ABC: Accelerated Bridge Construction Todd Stevens Final Design Unit Leader Presentation Outline • ABC – What it is/What it involves • ABC – Reasons to consider ABC • ABC – MN Applications • ABC - Analysis • ABC – MN Implementation • ABC – MnDOT Contact Info 2 Accelerated Bridge Construction Definition of ABC • Not just building bridges faster – Building bridges while minimizing traffic disruption — Contracting/Procurement Methods ―Construction Means/Methods • Affects Design, Cost, Risk, etc. (vs. Conventional Methods) 3 Accelerated Bridge Construction Contracting/Procurement Methods • Design-Bid-Build — “A + B” Bidding — Incentives ( Disincentives) — Off-peak Scheduling — Lane Rental • Design-Build • CMGC (new MN option; 2012 Leg.) 4 Accelerated Bridge Construction Construction Means/Methods • Materials — Concrete Steel Strengths • Equipment — SPMT, Cranes • Procedures — Post-tensioning, Precasting, Temp. Works • Maintenance of Traffic 5 Accelerated Bridge Construction Why Consider ABC? U.S. Bridge Deficiency U.S. Bridge Age 10 75% 10 to 19 50+ 25% 40 to 49