FHWA Accelerated Bridge Construction Workshop – Olympia, WA Bellevue Dow ntow n Bellevue Dow ntow n Access Project Access Project NE 8 th Street Bridge NE 8 th Street Bridge Replacem ent Replacem ent September 30 , 2008 Presented by Ron Ohlsen, PE HDR Engineering, Inc. Puget Sound Freew ay System Bellevue Direct Access Project 1
Local Street Improvements Freeway Improvements Transit/HOV Improvements Funding Partners Sound Transit $103.4 M City of Bellevue $12.8 M FHWA $31.2 M WSDOT $11.2 M TIB $6 M TOTAL $ 1 6 4 M NE 4 th Street Bridge 2
NE 6 th Street NE 8 th Street Bridge I -4 0 5 Corridor Traffic 3
NE 8 th Bridge Replacem ent Design Challenge How do you rebuild a major arterial running east/ west into the heart of downtown Bellevue without causing excessive disruption to traffic and commerce? Design Options: Close Old Bridge to Traffic, Close Old Bridge to Traffic, Demolish and Rebuild Demolish and Rebuild Stage Demolition and Stage Demolition and Reconstruction, One Half at a Time Reconstruction, One Half at a Time Modified Stage Construction of Modified Stage Construction of Bridge in a Tem porary Location Bridge in a Tem porary Location Design Selection Modified Staged Construction Build Half of the Bridge in a Temporary Build Half of the Bridge in a Temporary Location and then Roll the New Bridge Location and then Roll the New Bridge Approximately 64 Feet to the North. Approximately 64 Feet to the North. Benefits Reduce NE 8th Total Closures from 12- Reduce NE 8th Total Closures from 12- 18 Months to Nighttime Closures and a 18 Months to Nighttime Closures and a Handful of Weekend Closures. Handful of Weekend Closures. Risks Can You Build and Roll the Bridge into Can You Build and Roll the Bridge into Position? Position? 4
Structure Type Selection Considerations Span Length Span Length Structural Depth / Weight Structural Depth / Weight Roadway Vertical Clearance During Construction Roadway Vertical Clearance During Construction Traffic Maintenance Considerations Traffic Maintenance Considerations • NE 8th • I-405 Selected Structure Type Selected Structure Type • Composite Steel Girder / Concrete Deck NE 8 th Bridge Construction Old Bridge New Bridge 2 9 2 .5 Feet Long 3 2 8 Feet Long 1 0 3 Feet W ide 1 2 1 .5 Feet W ide 6 Lanes 8 Lanes 7 Bridge Piers 3 Bridge Piers Existing Bridge Existing Bridge 5
Existing Bridge Existing Bridge Construction Sequence – Stage 1 Construction Sequence – Stage 1 Construction Sequence – Stage 2 Construction Sequence – Stage 2 6
Construction Sequence – Stage 3 Construction Sequence – Stage 3 Construction Sequence – Stage 4 Construction Sequence – Stage 4 NE 8 th Street Bridge Construction Stages Stage 1 Stage 2 Stage 3 Stage 4 Summer 2002 Winter 2002/2003 Summer 2003 Autumn 2003 7
August 2 0 0 2 Pier 1 South Half Temporary Location August 2 0 0 2 Pier 2 South Half Temporary Location Stage 1 : Girder Erection September 9, 2002 8
Stage 1 Novem ber 2 -3 , 2 0 0 2 Weekend Traffic Shift #1 Stage 2 : W inter 2 0 0 2 - 2 0 0 3 9
Stage 2 : Bracing of rem aining piers Stage 2 : Dem olish North Half of Bridge Decem ber 2 0 0 2 North Half Dem olished 10
Feb. 2 5 -2 7 , 2 0 0 3 Setting Girders North Half March 2 0 0 3 Deck Form ing North Half May 17 & 18, 2003 W eekend Traffic Shift # 2 North Half 11
Stage 3 : Sum m er 2 0 0 3 Stage 3 : Dem olition June 2 0 0 3 Demolition of Old South Half 12
July 2 0 0 3 Pier 2 Construction South Half Permanent Location Stage 4 Construction Bridge Relocation Bridge Roll Preparations Jacking Scheme: Jack Stroke: 12 inches Jack Stroke: 12 inches 2% Cross-Slope 2% Cross-Slope Pull Loads: 57 kips at Abutments, Pull Loads: 57 kips at Abutments, 191 kips at Center Pier 191 kips at Center Pier 13
Bridge Roll Preparations September 2003 Pier 2 Dyw idag Connection to Diaphragm Adjust Hilm an Rollers 14
Sept. 1 9 , 2 0 0 3 Bridge Roll Before 15
Cut Them Off Be Flexible Closure Pour: Nov. 7, 2003 Photos: January 2004 After Closure Pour 16
I nnovative Delivery and Construction Methods to Minim ize I m pacts to Traveling Public Traffic Maintenance Traffic Maintenance – Detailed Traffic Analysis – City of Bellevue Involvement – Public Information Structure Demolition Methods Structure Demolition Methods NE 8th Bridge Rolling NE 8th Bridge Rolling Structure Dem olition Methods NE 8 th Project I ncentives Project Incentives to Limit the Project Incentives to Limit the Number of Days for Total HOV Closure Number of Days for Total HOV Closure Results Results – Contractor Received $190,000 Worth of Incentives – Reduced HOV Lane Closures by 19 Days Benefits Benefits – Reduction in Traffic I mpacts – Good Press, Positive Feedback from City, Business Community and Public – Opportunity for Contractor to Control this Phase of Work 17
NE 8 th Project I ncentives Project Accom plishm ents Project Completed One Year Ahead of Project Completed One Year Ahead of Schedule Schedule Project Cost $25 million under budget Project Cost $25 million under budget Recipient of Several Awards Recipient of Several Awards – Bellevue Chamber of Commerce Miracle of the Year (2) – ARTBA Pride Award 2005 – ASCE Outstanding Civil Engineering Project, Seattle Section 2005 Bellevue Dow ntow n Access Project Ron Ohlsen, P.E. HDR Engineering, Inc. ron.ohlsen@hdrinc.com 18
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