ABSTRACT
ABSTRACT: This is the second of two papers covering some long multi-span bridges in both urban and rural locations in Queensland, Australia. The first paper dealt with the New Gateway Bridge (renamed the Sir Leo Hielscher Southbound Bridge), a major concrete box girder bridge. This second paper covers two projects. The Yeppen Floodway Upgrade Project comprises three viaducts with a total length of 2.6 km crossing a flood plain near Rockhampton in Central Queensland. The Logan Motorway Interchange Viaduct is on the Springfield commuter railway line on the outskirts of Brisbane. All of these viaducts have superstructures comprised of pretensioned precast deck units or T-beams, each of a form which is economical and widely used in Queensland. Still there were choices to be made amongst these standard forms, affected by alignment, hydraulics, loading, and substructure options, as well as cost and availability.
