Post on 18-Dec-2021
transcript
SHRP 2 - R04 Innovative Bridge Designs for Rapid Renewal
FEHRL Long Life BridgesSQUARE (Brussels)
Thursday June 10, 2010
Phase 1Define
COMPLETE SYSTEMS Concrete Superstructures Composite Superstructures Eliminate Piles and Caps
Phase 1
PHASE 1 – Define
What has been done? What are the challenges? Feasible concepts (incremental)
Phase 1Define
RAPID RENEWAL – Bridge Systems
As Light as Possible As Simple as Possible As Easy to Erect as Possible
Develop
Phase 1 – Simpler
As Simple as Possible …
Fewer structure elements Fewer field splices Fewer bracing systems
ConceptsCategories
Phase 1 - Define Concepts
1. Precast Substructure Systems
2. Complete Superstructure Systems
3. Construction Technologies
Offsite Manufacture
2 – Superstructure Systems
2a - Modular beam systems Deck Bulb Tees and Double T’s Decked Girder Stringer systems Decked Box girder systems
2b - Segmental systems Segmental slabs Segmental voided slabs
RecommendedConstruction
Concepts
3 – ABC Construction Systems
Methods Launching, Sliding and Lateral shifting
Equipment Wheeled carriers / SPMT Straddle carriers Erection girders
Phase 1Define
3 – Construction Systems
Tier 1 Weekend closures
Tier 2 Completed in a few weeks
Tier 3 Save weeks and/or months on the overall schedule
RecommendedConstruction
Concepts
3 – ABC Construction Systems
Equipment
Wheeled carriers / SPMT Straddle carriers Erection girders
GantrySystems
UNIVERSAL ERECTION GANTRY Piles Substructure units Superstructure units Overlay
Courtesy Flatiron Construction
Washington Bypass
Courtesy Flatiron Construction
Pile driving, precast cap erection, precast beam erection, all from the rear.
Averaging 1 complete span per week
Gantry Systems
Step 1 – Deliver Gantry and Set-UpStep 2 – Remove Existing Step 3 – Erect New
Carrier delivers erection gantry Secondary vehicles deliver beams / units
Phase 3
PHASE 3 – WORK PLAN
Part 1 – ABC Tool Kit of Design Standards
Part 2 – Construct Demonstration Project
Part 3 – Specifications for ABC
Part 4 – ABC Training Materials
Iowa ABC Demonstration ProjectTier 2 - Two week closure
US 6Bridge over Keg Creek
Council BluffsIowa
Outside Existing
Footprint
Substructures ConstructionOutside existing footprint
Stage 1 Work (prior to closure) Construct drilled shafts to ground level Construct wingwalls on piles
Stage 2 work (during 14-day “ABC” period) Close bridge/enact detour Demolish existing bridge Assemble precast columns/capbeams Assemble semi-integral abutments
Demo Bridge
Sequence
Stage 3 work (during 14-day “ABC” period) Assemble modular superstructure Cast UHPC closure joints Re-open bridge to traffic
Phase 3
PHASE 3 – WORK PLAN
Part 1 – ABC Tool Kit of Design Standards
Part 2 – Construct Demonstration Project
Part 3 – Specifications for ABC
Part 4 – ABC Training Materials
Phase 3
TOOL BOX of ABC STANDARD SOLUTIONSPre-Engineered Solutions
Bridge Concepts
Staging Concepts
Equipment Concepts
Conclusions
LESSONS LEARNED?
Lesson 1 - About Innovation?
Lesson 2 - About Changes and Challenges?
Lesson 3 - About Implementation?
Conclusions
What have we learned so far?
Lesson 1…About Innovation
Incremental is essential Out of the box is good Recognize the Lag
Conclusions
What have we learned so far?
Lesson 2 … About Challenges?
Least initial cost vs best value (Owners) Self-performance (Contractors) Reluctance to change (Designers)
Conclusions
What have we learned so far?
Lesson 3 … About Implementation?
Collaboration (ATC – DB) Construction – Value