Title:
Kishwaukee River Bridges
Author(s):
Eugene A. Lamberson and James M. Barker
Publication:
Concrete International
Volume:
3
Issue:
8
Appears on pages(s):
93-101
Keywords:
bridges (structures); cantilever bridges;
epoxy resins; post-tensioning; precast concrete;
prestressed concrete; pretensioning; structural
design; trusses.
DOI:
Date:
8/1/1981
Abstract:
The Kishwaukee River Bridges, near Rockford, Ill., were innovative in that the Illinois Department of Transportation allowed the low bid contractor input in the design, redesign, and construction techniques to construct the most cost-effective structure. Various structures were studied and a precast concrete segmental cantilever design was the final solution. It was approximately 10 percent below the steel structure proposal. Major redesigning of the precast segments, erection methods, and post-tensioning techniques were instituted to facilitate construction while saving time and expense and still adhering to the environmental restrictions. Some minor problems