The project featured innovations in concrete design and construction. Pre-stressed, segmented concrete box girders were constructed in balanced cantilever, and supported on reinforced concrete curved pier substructures. In an Australian first, mid-span needle beam joints were used to provide deck articulatrion.
Another key feature was the use of continuous flight auger piles, using a high performance concrete mix design. This approach provides a 150-year design life despite challenging ground conditions.
Innovations in traffic management allowed additional works to be undertaken concurrently. Full traffic flow was maintained during peak hour, with no traffic accidents attributed to the staging. Design and modelling work for detours ensured functionality before implementation.
This project delivered an outstanding piece of infrastructure for South Australia, and dramatically reduced congestion on one of the state’s most important transport corridors. The Superway connects industry to air and sea ports, meets future residential and industrial demand and complements the long term growth of the area and Adelaide as a whole.