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RAILROAD BRIDGE AND TRACK DESIGN AND COORDINATION ISSUES

RAILROAD BRIDGE AND TRACK DESIGN AND COORDINATION ISSUES. Lloyd M. Wolf, P.E. Coordination with Railroad. Meet with Railroad Early in Project Development to Discuss Railroad Track Operations are Very Important Minimize Impact on RR Operations LOA and RR Agreement.

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RAILROAD BRIDGE AND TRACK DESIGN AND COORDINATION ISSUES

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  1. RAILROAD BRIDGE AND TRACK DESIGN AND COORDINATION ISSUES Lloyd M. Wolf, P.E.

  2. Coordination with Railroad • Meet with Railroad Early in Project Development to Discuss • Railroad Track Operations are Very Important • Minimize Impact on RR Operations • LOA and RR Agreement

  3. Structure Type SelectionandBridge Design

  4. Superstructure Considerations • Safety • Highway Users • Railroad • Required Span for Horizontal Clearance • Column Protection • Adequate Vertical Clearance

  5. Preferred Railroad Grade Separations 1. Overpass 2. UPRR Steel Deck Girder Standards • Deck Plate Girder w/ Steel Deck • Steel Girder w/ Conc Deck • Prestressed Beam w/ Conc Deck 6. Thru-Girder w/ Steel Deck

  6. UPRR Deck Girder Standard • Depth-Top / Rail to Low Chord = 5’-5” • Steel Deck • 69 ft Max Span Length

  7. Thru Girder • Depth-Top / Rail to Low Chord = 4’-6” • Steel Deck • 155 ft Max Span Length

  8. Superstructure Considerations • TxDOT Design Requirements • UPRR-BNSF Design Guidelines • KCS Design Guidelines • Composite and Non-Composite Design • No Sacrificial Beams • Design for 30” Ballast • Ballast Depth for Concrete Tie

  9. Vertical Clearance • Steel Deck Girder 16.5 ft • Steel Thru Girder-Bolt Bot Fl 17.5 ft • Prestressed Conc 17.5 ft • Hwy Over RR 23.33 ft

  10. Design Development and ReviewProcesswith Railroads

  11. Railroad Underpass • 30% Submittal - Exhibit “A” • 60% Submittal • 90% Submittal • 100% PS&E Plans RR Agreement with Exhibit “B”

  12. 30% Submittal - Exhibit “A” • Preliminary: • Bridge Layout • Track Plan and Profile • Track Typical Sections • Structure Type Selection Report • Thru Girder • LOA Facilitate RR Review

  13. Structure Type Selection Report • Required for Thru-Girder • Design Factors Considered • Underpassing Roadway Width • Clear Zone • Vertical Clearance • Consider All Options for Railroad

  14. RR Requirements Sheets

  15. 60% Submittal • Complete Bridge Plans • Complete Mainline and ShooFly Track Plans and Profiles • Railroad Track Standards • Mainline and ShooFly Typical Sections

  16. 60% Submittal, ctd • Track Sections every 50 ft • Division of Labor • Sequence of Work

  17. 90% Submittal • Revised Complete Bridge Plans • Revised Complete Mainline and ShooFly • Track Plans and Profiles • Mainline & ShooFly Typ Sections

  18. 90% Submittal, ctd • Track Sections every 50 ft • All Parts of PS&E that Affect the Railroad • All Specifications

  19. 100% Submittal • Complete PS&E That Affects RR • Complete Bridge Plans • Complete Mainline and ShooFly • Track Plans and Profiles • Mainline & ShooFly Typ Sections • Sequence and Division of Work • RR Agreement w/ Exhibit “B” Attachment

  20. Mainline Bridge ReplacementShoo-Fly Construction

  21. Track Plans & Sequence of Work • Bridge Replacement on Mainline • Longer Span and Increased Clearance • Track Raise • Shoo-Fly Construction Best Maintains RR Operations

  22. Track Design Speed • Railroad Operating Dept Determines Speed • Mainline & ShooFly Same Speed ? • Existing Conditions • Future Upgrades • Design Speed Agreement

  23. Railroad Track Grade Raise • No Grade Raise is Desirable • 6” Max Raise with Ballast Only • Use Subballast for Greater Raises • ShooFly Profile Grade • Ballast Delivery May Be an Issue

  24. Bridge DesignandTrack DesignResources

  25. Bridge and Track Design Resources • TxDOT and Individual Railroad • Use TxDOT Annotated Guidelines • TxDOT Website • BRG Project Development Web Page • BRG FTP Site • AREMA and AASHTO

  26. Bridge and Track Design Resources • UPRR, BNSF, KCS Guidelines and Standards • Updated Requirements and Standards TxDOT Bridge FTP Site: • ftp://bridge:txdot1@ftp.dot.state.tx.us • Railroad Bridge and Track Design

  27. Ballasted Track Construction Specification • Bridge Division has a Reference Spec Available for Project Use • Bridge Division is Working to Develop Statewide Special Spec

  28. Thank You

  29. Lloyd M. Wolf, P.E.512-416-2279lwolf@dot.state.tx.us

  30. Estimated Costs 2008BridgeandTrack

  31. Estimated Railroad Costs 2008 Steel Deck Girder = $350 / SF with Steel Deck Steel Thru Girder = $450 / SF with Steel Deck Prestressed Beam = $225 / SF with Concrete Deck

  32. Estimated Railroad Costs 2008 ShooFly Bridge with Open Deck = $350,000 / EA Temp Special Shoring = $60 / SF

  33. Estimated Railroad Costs 2008 Ballasted Track = $240 / LF with 1 ft Raise Ballasted Track = $170 / LF No Raise Ballasted Track = $45 / LF Removal

  34. Estimated Railroad Costs 2008 Turnout / Switch = $85,000 / EA Signal for Switch = $50,000 / EA Including Circuit

  35. Estimated Railroad Costs 2008 Engineering Design Review = $100-175,000 And Construction Inspection Railroad Flagging = $900 / Day

  36. Mainline Track Raise at Turnout

  37. Mainline Track Raise with Ballast Retainer

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