Bridges

Sydney Gateway is a road and rail project to cater for forecast growth in passengers and freight through Sydney Airport and Port Botany. The project comprises road (Stages 1 & 3) and rail (Botany Rail Duplication Stage 2, delivered separately by Australian Rail Track Corporation (ARTC). The Sydney Gateway road project completes the missing links in the motorway network, and will improve traffic flow and reduce travel times. The project is located in a highly developed brownfield environment, with adjacent road, rail, pedestrian, air transport, water and miscellaneous utility infrastructure.

There are 13 bridge locations on the Sydney Gateway Project located within a radius of 2.5km which is one of the most congested and complex bridge projects in the world. Of the 13 bridges there are 6 signature bridges on the project include incrementally launched steel network arch bridges with a span of 104m, a 355m long composite steel box girder bridge with spans up to 85m built by SPMT Method, an 83m long variable depth composite steel box girder bridge built by combined SPMT and crane erection, a 72m long constant depth composite steel box girder bridge built by crane erection, a 75m long variable depth composite steel box girder pedestrian bridge built by SPMT Method and a 549m long elevated viaduct including 34m precast concrete girder super tee spans and 55m composite steel box girder spans. This paper outlines the signature bridges on the project, the relevant constraints involved and the construction methods. At the time of writing this paper, the design is complete and construction in ongoing.