Construction of the Blanchetown Bridge

Dr Peter Mitchell and Richard Herraman

Construction of the new bridge at Blanchetown is nearly complete. The new bridge was incrementally launched and its deck is a post tensioned concrete box girder 407m long. Some difficult ground conditions and the close proximity of the existing bridge posed problems for both design and construction. Prior to construction, predictions were made of the following: movement of bridge piers during launching of the deck settlement of the eastern approach embankment movement of the existing bridge during placement of fill nearby In this presentation the monitoring and performance of these structures was described in addition to foundation and earthworks construction.

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