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?