Bridges

Cover of Kingsgrove to Revesby Rail Quadruplication: Design and Construction of the Overbridges
Kingsgrove to Revesby Rail Quadruplication: Design and Construction of the Overbridges
  • Publication no: ABC-CAS007-11
  • Published: 31 October 2011

This paper provides a high level overview of the Kingsgrove to Revesby Quadruplication Project. This project is being delivered by Transport Construction Authority (TCA) in an alliance with Leighton Contractors, AECOM (formerly Maunsell Australia), Sinclair Knight Merz, MVM Rail and Ansaldo STS (the K2RQ Alliance). The project scope includes constructing two additional fast tracks between Kingsgrove and Revesby stations (approximately 7.2km) on the Sydney rail network. It is currently under construction in NSW. The additional tracks will allow the complete physical separation of local and express services operating on the East Hills Line. The Alliance was presented with a number of challenges from site and operational constraints, the staging of the works and the linear nature of the works. This necessitated the incorporation of many interesting innovations in the design and construction processes. This paper’s focus is on those innovations adopted for extending the existing King Georges Road Overbridge to accommodate the two additional tracks underneath. This, in particular, presented enormous challenges, in relation to the construction staging which was driven by limited track possessions, limited road closures due to the disruption this caused to the local community and very limited area for works due to the proximity of live traffic, rail boundaries and nearby buildings. Examples of innovations in the design include developing innovative overbridge pier design and steel strengthening solutions and using parts of the existing structures to limit the amount of work required. This, combined with the construction methodology and close collaboration between the Alliance, RailCorp (rail operator and owner) and the Roads Traffic Authority (RTA), ensured the works were able to be delivered to program with no impact on the operational railway and with limited disruption to road users and pedestrians.