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Structures team scores a win at SAICE Regional Awards

25th July 2018

By: Creamer Media Reporter

     

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Cape Town office Structures team were proud to be announced the winner for the 2018 Best International Project at SAICE’s Western Cape Regional Awards, for the Sydney Metro Cable-Stayed Bridge project.

Located in the north west of Sydney this unique, curved three-span cable-stayed rail bridge was constructed using precast segmental concrete. The bridge forms the tail end of a 4.5km elevated viaduct that is part of the new Sydney Metro.

The cable-stayed bridge and its temporary works were designed by SMEC South Africa’s Structures team. The team first conceived the winning tender design, for contactors Salini Impregilio, in a design and build tender. They then went on to develop the detailed design and undertook the erection engineering work for its construction. It was a mammoth task that absorbed a team of up to 15 staff for over four years.

Team members from South Africa included John Anderson (Functional General Manager for Structures); Maja Wilson; Warrick de Kock; Roger Dickson; Raadiyah Gasnola; Nadine Stockwell; Nazeer Muller; Willem Stolk; Jonathan Adams; Mervyn Lewis; William Martin; Nicholas Featherston; Stefan Oberholzer. Derik Hanekom worked on the design of the bridge in the Cape Town office, and subsequently relocated to Sydney in 2015 to work on site.

Curved cable-stayed bridges are rare and curved cable-stayed rail bridges even rarer. The conceptualisation, detailed design and construction of this bridge was a huge technical challenge that went beyond conventional cable stayed practice and technology. The deck superstructure was first built as a seven span continuous girder on temporary supports using an overhead self-launching gantry. Thereafter the bridge was converted into a three span cable stayed bridge and the temporary supports were removed. The challenge became the integration of precast segmental technology with the demands of cable stayed bridge construction.

Edited by Creamer Media Reporter

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