John James Audubon Bridge-Approaches

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John James Audubon Bridge Cost: $348 million Client: Louisiana Department of Transportation and Infrastructure Location: St. Francisville, LA Markets: Bridges Flatiron is designing and building a new cable-stayed bridge across the Mississippi River. The bridge, to be formally called the John James Audubon Bridge, will replace the ferry system currently in place and will connect St. Francisville with New Roads just north of Baton Rouge, Louisiana.

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John James Audubon Bridge:

John James Audubon Bridge Approach Structures and Bridges

Approach Structures:

Approach Structures General 7 complete roadway bridges 2 approach bridges at the Mississippi River

The Bridges:

The Bridges Bridge 8 Bridge 7 Bridge 6 Bridge 5 Bridge 4 Bridge 3 Bridge 2 Approach Bridges Bridge 1

Approach Structures:

Approach Structures Bridge 1 (Aug 27, 2007 – Jan 16, 2008) 140’-0” long 2 abutments 2 bents 2 approach slabs 6 pile each bent 840 LF square concrete pile 14 pile each abutment 1540 LF square concrete pile AASHTO Type III girders

Bridge 1:

Bridge 1 140’ Bridge 1 Side View

Approach Structures:

Approach Structures Bridge 2 (May 21, 2007 – Feb 17, 2009) 4051’-0” long 2 abutments 56 bents 2 approach slabs 240 each square pile 15,000 LF of pile 57 AASHTO Type III Girders 15 AASHTO Type 72” Bulb T Girders

Approach Structures:

Approach Structures Bridge 2: 4051’ long, 56 Bents

Approach Structures:

Approach Structures Main Span Approaches

Main Span Approaches:

Main Span Approaches

Main Span Approaches:

Main Span Approaches

Main Span Approaches:

Main Span Approaches

Approach Structures:

West Approaches West abutment is supported by driven pile 2773’-6” long 25 piers Pier 27W to Pier 12W are supported by driven pile Pier 11W to Pier 3W are supported by drilled shafts Span 27W to span 11W have AASHTO Type III Girders Approach Structures

Typical Cross Sections AASHTO Type III, Bulb Tee & Steel Plate Girders:

Typical Cross Sections AASHTO Type III, Bulb Tee & Steel Plate Girders

Approach Structures:

Approach Structures Sequence of Events Set pile template Drive Pile into ground Cut pile to length Build foundation onto pile using formwork Build deck supports on piers Construct deck on supports

Bridge 3 High & Low Level Approach:

Bridge 3 High & Low Level Approach

Approach Structures:

Approach Structures Main Span Approaches West abutment is supported by driven pile West approach is 2773’-6” long West approach has 25 piers East abutment is supported on a spread footing East approach is 6920’-6” long East approach has 82 piers

Approach Structures:

Approach Structures Main Span Approaches (continued) Supported by driven pile & drilled shaft AASHTO Type III Girders, 72” Bulb T girders, plate girders Span 10W to span 7W have 72” Bulb T girders Span 6W to span 3W have plate girders Pier 16E to pier 84E is supported by driven pile

Approach Structures:

Approach Structures Main Span Approaches (continued) Pier 3E to pier 15E is supported by drilled shafts Span 3E to span 14E have 72” bulb T girders Span 15E to span 84E have AASHTO type III girders 107 Pier caps 214 6’-0” diameter concrete columns 5 link beam

Approach Structures:

Approach Structures Main Span Approaches (continued) 42 drilled shafts 6658 lf of drilled shaft 546 24” square pc driven pile 24 12” square pc driven pile 48,938 LF of driven pile 34 expansion joints

Bridges 4-8:

Bridges 4-8 2 abutments Piers with caps Approach slabs 24” each square pc pile 30” each square pc pile 16” each square pile AASHTO type III girders 16” 24”

Approach Structures:

Approach Structures Bridge 8 (continued) 3985 LF of driven pile 124,546 SF of deck

Approach Structures:

Approach Structures Bridges 4 through 8

Bring in Pile on Trucks:

Bring in Pile on Trucks

Drive Pile with Hammer:

Drive Pile with Hammer

Cut Pile:

Cut Pile

Inside Form For Pier Cap:

Inside Form For Pier Cap

Slide 27:

Side View of Pier Cap Forms

Slide 28:

Fill Form With Concrete

Slide 30:

Completed Pier Caps

Slide 31:

Truck in Girders and Erect on Pier Caps

Slide 32:

Set Girders

Slide 33:

Girders Set

Slide 34:

Girders Set

Slide 35:

Form Bridge Deck and Overhang

Slide 36:

Pour Bridge Deck

Slide 37:

Completed Bridge Deck

Approach Structures:

Approach Structures Bridge 4 (Aug 2, 2007 - Oct 15, 2008) 670’-0” long 2 abutments 8 piers 2 approach slabs 32 24” each square pile 20 16” each square pile 4350 LF of driven pile

Approach Structures:

Approach Structures Bridge 4 (continued) 8 pier caps 45 AASHTO type III girders 28,084 SF of deck

Approach Structures:

Approach Structures Bridge 5 (May 17, 2007 – Aug 9, 2008) 1075’-0” long 2 abutments 14 piers 2 approach slabs 48 24” each square pile 8 30” each square pile 20 16” each square pile

Approach Structures:

Approach Structures Bridge 5 (continued) 8234 LF of driven pile 14 pier caps 75 71’-8” AASHTO type III girders 45,060 sf of deck

Approach Structures:

Approach Structures Bridge 6 (Mar 15, 2007 – Mar 25, 2008) 625’-0” long 2 abutments 8 piers 2 approach slabs 32 24” each square pile 20 16” each square pile 3740 LF of driven pile

Approach Structures:

Approach Structures Bridge 6 (continued) 8 pier caps 45 698’-5 ¼” AASHTO type III girders 26,198 SF of deck

Approach Structures:

Approach Structures 2 abutments 5 piers 2 approach slabs Bridge 7 (Jan 31, 2007 – Nov 20, 2007 16 24” each square pc pile 4 30” each square pc pile 20 16” each square pile

Approach Structures:

Approach Structures Bridge 7 (continued) 3691 LF of driven pile 5 pier caps 30 69’-2” AASHTO type III girders 17,395 SF of deck

Main Span Approaches:

Main Span Approaches

Slide 47:

Main Span Approaches

Main Span Approaches:

Main Span Approaches

Shoring Towers :

Shoring Towers Shoring towers support girders during erection Jacks at the bottom allow adjustments

Main Span Approaches:

Main Span Approaches

Main Span Approaches:

Main Span Approaches

Girder Connections:

Girder Connections

Girder Erections:

Girder Erections

Girder Erections:

Girder Erections Girder Erections

Support for Girders:

Support for Girders