John James Audubon Bridge Main Span Materials and Equipment Cement from Thailand Structural Steel from Japan Oscillator from Germany Wind tunnel analysis.

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Presentation transcript:

John James Audubon Bridge Main Span

Materials and Equipment Cement from Thailand Structural Steel from Japan Oscillator from Germany Wind tunnel analysis from Ontario, Canada

Main Span Sequence of Events –Construct drilled shafts –Construct footing –Construct towers –Lay deck –Attach stay cables

Drive Permanent Casing Set Permanent Casing In Frame Drive To Grade (Vibratory Hammer)

Set Shaft Template The drilled shaft template holds the casing straight as it is vibrated into the ground

Drive Permanent Casing A vibratory hammer is used to vibrate the casing into the ground

Install Oscillator Layout/Place Oscillator Base And Lock Down Place Oscillator

Install Oscillator 1. Set Base

2. Set Oscillator Install Oscillator

Drive Temporary Casing Speed has been accelerated An oscillator works like someone is opening and closing a jar (back and forth)

Footing Cofferdam Structure Piles and trestle are installed

Install Soffit Panels

Install Bracing Frame Install first tier of brace frame

Erect Pre-Cast Wall Install pre-cast walls Connect to soffit panels and first tier brace frame

Install Jacking System Install jacking system with permanent hangers Lower structure to facilitate 2 nd & 3 rd tier bracing installation

Install 2 nd and 3 rd tier brace frame. Install Additional Brace Frames

Install Follower Sheeting Install sheet pile

Lower Structure Lower structure to final elevation Lock off hangers

Pour Concrete Seal Install 8 foot concrete seal Oink

Dewater Structure Install pump. Remove water

Remove Hangers and Cut Casing Remove hangers Cut casing

Place Reinforced Pile Cap Place reinforced pile cap concrete

Place Pedestal Concrete Place pedestal reinforcing and concrete lift 1 Restrut as required

Place Pedestal Concrete Lift 2 Place pedestal concrete lift 2

Remove Cofferdam Remove sheeting Remove Bracing Patch blockouts

Build Main Span Towers Install formwork & rebar Pour concrete Raise formwork Repeat process

Install Girders

Build Bridge Deck

Install Segmental Sections

Bridge Segments Segments are installed in sections Cable anchorage is added Cable stays are installed for support

Build bridge in segments Install Cable Stays to support bridge Overall Method of Construction

The Finished Bridge