ABSTRACT
The South Road Bridge is part of the $620 million Darlington Upgrade design/build project which provides for the improvement of approximately 3.2 kilometers of one of the most important transit corridors in Adelaide, Australia. The bridge is 180 meters long and consists of three-span continuous twin curved steel tub-girders carrying a multi-use path as well as vehicular traffic over a major expressway. The design of the bridge is innovative in its use of double composite concrete construction, where the girder section over the piers acts compositely with the deck as well with the concrete poured in the bottom of the steel tub section to resist negative bending moment demands. To minimize closure times on the expressway, the contractor chose to build the bridge in its entirety at a nearby site and move the bridge into place using self-propelled modular transporters (SPMTs).
