Fort Goff Creek Bridge R04 ABC Project -...
Transcript of Fort Goff Creek Bridge R04 ABC Project -...
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Fort Goff Creek Bridge R04 ABC ProjectDorie Mellon, PEStructure Policy & InnovationDivision of Engineering ServicesCaltransMay 20, 2015
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26/4/2015
Fort Goff Creek Bridge
Lead AdopterSHRP2 Solutions Innovative Bridge Designs for Rapid Renewal
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36/4/2015
• California law requires unimpaired passage for all anadromous fish at stream crossings
• Replace 60-year-old culvert with 60’ long single span bridge
Fort Goff Creek Bridge
Fort Goff Creek Bridge Streambed Restoration Project
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Fisheries Restoration Grant Program (FRGP) [capital]
Cal Department of Fish & Wildlife (CDFW)
National Oceanic & Atmospheric
Administration (NOAA) Fisheries
National Marine Fisheries Service (NMFS)
Caltrans SHOPP (Minor fund) [support]
Office of Traffic Safety [capital]
SHRP2 (Strategic Highway Research Program #2) [support & capital]
American Association of State Highway & Transportation Officials (AASHTO)
Federal Highway Administration (FHWA)
United States Fish & Wildlife Service (USFWS) [support]
PacifiCorp Coho Enhancement Fund (CEF) [capital]
Fort Goff Bridge
Funding Sources
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5
Fort Goff Creek Bridge
Challenges:• Project in severe
climate area• Freeze-thaw
cycles and heavy salting
• Nearest batch plant located 90 minutes away from site
Fort Goff Creek Bridge
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Advance Planning Study Alternatives
Cast-in-place$1,043,000
Precast Superstructure$937,000
All Precast Elements$928,000
Early Analysis for Structure Type
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Type Selection
Prefabricated Elements
•PC Voided Deck Slabs•PC Abutment Elements•PC Wingwalls•Prefabricated Rail
Advantages
•Ensure concrete quality•Reduce MOT•Reduce creek impacts•Reduce risk of extending to second season
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• Single row of piles• Repeatable elements• Pick weight under 95K• Pre-assemble substructure
elements prior to shipping• Fabrication tolerances in
specifications
ABC Toolkit Implementation
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Design-Bid-Build/Low BidderStructure estimate at time of bid: $978,572Successful bid: $1,309,843Final Cost: $1,400,303 ($660/sqft)Difference due to
• Award to 3rd bidder• Remote location• Aesthetics• 7 bidders but only 1 prefab subcontractor
Bid Process
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Construction: Detour
One way signalized traffic Temporary culvert for detour
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Construction: Foundation
12 - 30” CIDH PilesJune 4-September 10
71 Working Days!
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Construction: Foundation
4 sac slurry for abutment bearing pad proved an effective leveling pad.
September 12, 2014
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Construction: Abutments
•6 precast abutment elements, 85kips each•Voids formed with 36” diameter corrugated metal pipe
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Construction: Abutments
Sept 16 & 17, 2014
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Construction: Abutments
September 18 & 19, 2014
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Construction: Precast Erection
September 23, 3014
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Construction: Precast Erection
September 23, 2014
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Construction: Connections
October 13, 2014
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Construction: Rail & Aesthetics
California ST-70 Bridge RailArchitectural treatment achieved by
the use of form liners and on-site staining.
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Completed Project
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Lessons Learned: CIDH Piling
1. Take foundation risk into account when developing schedule
2. Consider drilling system submittal to ensure drilling contractor shows up with the right equipment for the job.
3. Use spread footing or driven piles when possible to control schedule.
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Lesson Learned: PC Abutments
Fort Goff Creek Bridge
Impact of abutment segment connection method on working days
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Lessons Learned: PC Abutments
Grouting keyways and post tensioning ducts proved challenging
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•Increased lead time for shop plan review•Develop guidance for shop plan review•Allocate adequate resources for source inspections•Abutment seat grades require close review on shop plans•Precast QC/QA needs to be closely monitored and enforced•Review all shop plans concurrently to avoid conflict (precast, post-tension, and prefab rail)
Lessons Learned: Review & Inspection
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Lesson Learned: Rebar Congestion
Pay close attention to steel congestion,particularly in skewed elements.
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Lessons Learned: Deck Overlay
Differential girder elevations are smoothed over with deck overlay
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•Clearly define fabrication and erection tolerances •Use slurry pad for setting abutment•Be proactive to ensure fit-up in the field•Keep PC elements reasonable weights•Overlay thickness accommodates tolerances
Best Practices
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Fish Passage
"The Fort Goff Fish passage project is a big success so far – King salmon got right in there right away and ended up making 64 redds this fall! King salmon probably could not get in there at all before the passage project as determined by spot checking for King salmon adults and juveniles over the years."Happy holidays,FlickDon FlickingerNOAA Fisheries West Coast RegionU.S. Department of Commerce
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2013 Fish Passage Annual Report to LegislatureCoastal Anadromous Fish Passage Assessment and Remediation
Progress Report
Fish Passage Program
569 estimated Caltrans fish passage barriers!
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•Successfully implemented SHRP2 ABC Toolkit
•Gathered Lessons Learned to further develop ABC Toolkit
•CT Construction and Program Managers have already targeted multiple projects for similar ABC approach
•Potential for widespread application in fish passage projects
•Caltrans is pursuing ABC on a larger scale
In Review
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316/4/2015
Thank you