Launching a Concrete Bridge Saves $200,000


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Title: Launching a Concrete Bridge Saves $200,000

Author(s): David T. Swanson

Publication: Concrete International

Volume: 1

Issue: 4

Appears on pages(s): 24-29

Keywords: box beams; concrete construction; girders; jacks (lifts); post-tensioning; precast concrete; prestressed concrete; prestressing steels.

Date: 4/1/1979

Economy and the unpredictability of the Wabash River in Indiana were major factors in choosing the incremental launching method for a 935 ft long concrete box girder bridge. The superstructure is supported by skewed, solid wall piers founded on rock. A system was designed which involved a launching nose, temporary bridge supports and hydraulic launching jacks to advance the prestressed concrete box girders from the fabrication area across the river. Post-tensioning was accomplished after the concrete reached 3500 psi.