Post on 27-Mar-2020
TIGHT CONSTRUCTION WINDOWS FOR BNSF RAILWAY BRIDGE 24.8 REPLACEMENT IN CAMAS, WASHINGTON
TIGHT CONSTRUCTION WINDOWS FOR BNSF RAILWAY BRIDGE 24.8 REPLACEMENT IN CAMAS, WASHINGTON
Alan Bloomquist, BNSFJay Hyland, TranSystemsAlan Bloomquist, BNSFJay Hyland, TranSystems
November 13, 2018November 13, 2018
BNSF Bridge 24.82
HISTORY OF RAILROAD CONSTRUCTION
Rapid Early Construction due to incentives and rules around land grantsGenerally built in wilderness areas with no permitting concernsOnly way to deliver material was on newly built track
BNSF Bridge 24.83
HISTORY OF RAILROAD CONSTRUCTION
BNSF Bridge 24.84
HISTORY OF RAILROAD CONSTRUCTION
Linear On-Track equipmentUtilized local material to build timber spansSteel shipped out from eastern plantsField engineering and decisions made on the fly to build substructureUse of Standards due to lag in communication
BNSF Bridge 24.85
HISTORY OF RAILROAD CONSTRUCTION
BNSF Bridge 24.86
RIGHT-OF-WAY (ROW) IMPACTS
BNSF Bridge 24.87
RIGHT-OF-WAY (ROW) IMPACTS
Limited ROWUsually not more than 100’ wide
Limited Staging AreasLimited ability to “shoo-fly”Utilize on-track equipment if possiblePermitting benefits
Can pre-empt state/local permits
BNSF Bridge 24.88
BUSINESS IMPACTS
Trains = RevenueTrack time is priorityWork must be completed within dedicated windows
~6 hrs for a small bridge (spans less than 35’)~12 hrs for a long bridge of shorter spans~24 hrs for a large bridge (long steel spans)~48 hrs if you want to be laughed at
BNSF Bridge 24.89
METHODS - DESIGN
Standard DesignDeveloped standard plans that allow modular type constructionUtilize similar details as much as possibleDesign around “traffic impact” as primary concernDetails must incorporate existing bridge layout limitations
Non-Standard Design
BNSF Bridge 24.810
METHODS - DESIGN
BNSF Bridge 24.811
METHODS - CONSTRUCTION
Construction methods that limit track time are valuableSliding or rollingSetting pieces with single crane picks
On-Track equipmentCranes on railMaterial delivered by car
Construction foundationsThrough and around existing bridge structureImpact pile driving over vibratory
BNSF Bridge 24.812
PROJECT SITE
BNSF Bridge 24.813
BRIDGE HISTORY
Built by the SP&S Railway in 1911Designed by Modjeski as a StandardNew construction from Portland to Spokane
BNSF Bridge 24.814
PROJECT OVERVIEW Span ArrangementTwo 50’ Deck Plate Girder SpansTwo 200’ Through Truss Spans Pin Connected
Cast-in-Place Concrete Piersand Abutments
40 Trains Per Day Passenger and Freight
BNSF Bridge 24.815
PROJECT OVERVIEW
100+ Yr. Old Pin Connected TrussesIn-Line Replacement Planned for Two 32 Hour Track WindowsNo Reuse of Existing SubstructureNew Substructure Spaced Around ExistingNew Single Track Bridge 545’ Long
200’ Through Truss162’ & 92’ Through Plate GirderTwo 42’ Conc. Double Cell Box Girders
BNSF Bridge 24.816
PROJECT OVERVIEW
Design, Bid, & Build ContractSelect Contractors to Bid (Owner Approved)Selection Basis
PriceContractor Specified Changeout Window Duration
TranSystemsDesigner
Estimate Changeout Window Duration
BiddingConstruction Management
BNSF Bridge 24.817
PROJECT OVERVIEW
Design Life100+ Yrs.
Design Loadings Cooper E-80 Live LoadAlternate Live Load
(4-100 Kip Axles)
Diesel Impact for Rolling Equipment w/o Hammer Blow for Ballast Deck
BNSF Bridge 24.818
PROJECT OVERVIEW
Design Loadings Stream Flow – 4.3 ft/second at 50 Year Water SurfaceWind Loads – 50 psf Unloaded Structure & 30 psf Loaded StructureScour – 100 Year and 500 Year Flow Scour Depth Seismic Design
BNSF Bridge 24.819
PROJECT OVERVIEW
Material Types Structural Steel
A709 Grade 50W (No Paint) Impact Requirements - T2 (non-FCM) or F2 (FCM)
Cast-In-Place Concrete Pier Caps/Drilled Shafts4,000 psi
Prestressed Concrete Double Cell Box Beams4,000 psi at Transfer - 5,000 psi at 28 Days
Reinforcing SteelA615 Grade 60 (uncoated)
BNSF Bridge 24.820
BRIDGE ELEVATION
BNSF Bridge 24.821
BRIDGE ELEVATION
BNSF Bridge 24.822
BRIDGE ELEVATION
BNSF Bridge 24.823
TYPICAL SECTION
BNSF Bridge 24.824
TYPICAL SECTION
BNSF Bridge 24.825
ABUTMENT DETAILS
Piles Welded to Embed Plate in Precast Abutment CapBolted Precast Wingwalls
BNSF Bridge 24.826
AERIAL OF TEMPORARY WORK BRIDGES
BNSF Bridge 24.827
TEMPORARY WORK BRIDGE PLAN
BNSF Bridge 24.828
TEMPORARY WORK BRIDGE CONSTRUCTION
BNSF Bridge 24.829
TEMPORARY WORK BRIDGE CONSTRUCTION
BNSF Bridge 24.830
PRELIMINARY CHANGEOUT WORK
Abutment Piles Driven During Daily Track Windows
Up to 4 hour windows
BNSF Bridge 24.831
PRELIMINARY CHANGEOUT WORK
Substructure ConstructionDrilled Shafts Installed Prior to Window
Spaced to Clear Existing Superstructure
Cast-In-Place Concrete Cap Installed UnderExisting Bridge Truss
About One Foot Clearance to Low Chord
BNSF Bridge 24.832
PRELIMINARY CHANGEOUT WORK
Truss Assembly on Falsework
BNSF Bridge 24.833
TRUSS DEMOLITION PEDESTALS
BNSF Bridge 24.834
FIRST 32 HOUR TRACK WINDOW
Translation Frames UtilizedTruss Roll OutTruss Roll In
Skid Shoes SupportingEach Chord of TrussMoved Using A Threaded Rod Jack Attached to SkidsTranslation Beams Coatedwith Graphite Paint
BNSF Bridge 24.835
NEW TRUSS SLIDE-IN
BNSF Bridge 24.836
AERIAL PHOTO DURING TRACK WINDOW
BNSF Bridge 24.837
FIRST 32 HOUR TRACK WINDOW VIDEO
BNSF Bridge 24.838
SECOND 32 HOUR TRACK WINDOW
Translation Frames & Skid Shoes UtilizedTruss Roll OutThrough Plate GirderSpans Roll In
BNSF Bridge 24.839
TRUSS DEMOLITION PEDESTALS
BNSF Bridge 24.840
AERIAL PHOTO DURING TRACK WINDOW
BNSF Bridge 24.841
SECOND 32 HOUR TRACK WINDOW VIDEO
BNSF Bridge 24.842
COMPLETED BRIDGE
BNSF Bridge 24.843
LESSONS LEARNED
Contingency Planning (What If Planning) Detailed Track Window Construction ScheduleAdjustments For Second Track Window – Additional Equipment For Excavation and DemolitionOverlapping Tasks Rather Than Linear TasksReview Material Orientation For Crane PicksTest Slide of Spans
BNSF Bridge 24.844
AWARD WINNER
2017 Best ABC Project in Lateral Slide Technology (Railroad Bridge)
In-Line Replacement of BNSF Bridge 24.8
Owner: BNSFDesigner: TranSystemsContractor: Hamilton Construction Co.
Construction Cost $20M
BNSF Bridge 24.845
QUESTIONS?