Production, Transportation, and Installation of Spliced Prestressed Concrete ‘I’ Girders for the Annacis Channel East Bridge

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Title: Production, Transportation, and Installation of Spliced Prestressed Concrete ‘I’ Girders for the Annacis Channel East Bridge

Author(s): S. L. Marshall and R. E. Pelkey

Publication: Special Publication

Volume: 93

Issue:

Appears on pages(s): 737-768

Keywords: bridges (structures); conveyinq; girders; I-beams; installing; post-tensioning; precast concrete; prestressed concrete; production methods; segmental construction; splicing

Date: 9/1/1986

Abstract:
Precast concrete ‘I’ girder sections are commonly used in Bridge construction in the Province of British Columbia. The Annacis Channel East bridge represents the latest development in the trend to longer and deeper ‘I’ girders. Prior to this project, there were six standard ‘I’ girder shapes ranging in depth from 914mm (3.0 ft.) to 2300mm (7.6 ft.). A new section 2750mm (9.0 ft.) deep, was specially developed to allow span lengths of 60m (196.9 ft.) and 71m (233.0 ft.) and thereby reduce the number of river piers from three to two. A $1.0 million premium cost for the super-structure was more than offset by the $2.5 million savings for one river pier. A further development involved the field splicing of a segment balanced on a pier cap and side span segment with a cast-in-place diaphragm and field post-tensioning.