The Sydney Metro West – Western Tunnelling Package comprises nine kilometres of twin metro rail tunnels between Westmead and Sydney Olympic Park, the excavation of two metro stations at Westmead and Parramatta, twin 750-metre spur tunnels, and a stabling and maintenance facility at Clyde. The WTP project included the use of two tunnel boring machines and enabled a doubling of rail capacity between Parramatta and Sydney CBD.
The Judging Panel commended the introduction of Australia’s first gasketed, precast segmental lining system for a mined tunnel, providing an alternative to the traditional in-situ lining approach. The Panel highlighted the incorporation of a purpose-built installation machine, as well as improved safety, productivity and quality while establishing a new, replicable method for future tunnel projects.