Substantial works on the first section of tunnels of the Sydney metro project have been completed according to civil engineering firm Ghella and CPB Contractors. CPB and Ghella were awarded the US$1.3bn contract for the Western Sydney Airport, Station Boxes and Tunnelling (SBT) project by the New South Wales government in December 2021.
As per a statement on its website, CPB said that it completed section S9 of its Western Sydney Airport, Station Boxes and Tunnelling (SBT) project, which comprises twin 1.2km-long tunnels running between the Airport Business Park and Airport Terminal sites.
The excavation of the S9 portion is said to represent 12% of the SBT project’s 9.8km tunnel scope of works. The project took about three months, with tunnel boring machines (TBMs) Eileen and Peggy excavating more than 116 thousand tonnes of rock.
Delivery of this project milestone also included the placement of more than 4,400 precast segments to construct 743 concrete rings.
Works include the design and construction of 9.8km of twin tunnels and excavations for stations at St Marys, Orchard Hills, Airport Business Park, Airport Terminal and Aerotropolis and services facilities at Claremont Meadows and Bringelly.
