Tunnelling at Forrestfield, the site that hosts the infrastructure vital to tunnel boring machine (TBM) operations, began in August (TBM Grace) and October (TBM Sandy) 2017. The site is operating 24 hours a day to support tunnelling activities, including processing excavated soil and treating water for reuse in the tunnelling process.
Construction of infrastructure is progressing well across all areas of the Forrestfield site, however focus has shifted to the central and northern areas, with the completion of civil works for the stowage building and the 130m-long stowage platform at the southern end of the site. Fit-out of the stowage building will commence later this year.
The stowage area is the place where trains will be maintained whilst not in use.
At the centre of the site significant progress has been made with the completion of the suspended section of the concourse level. This was followed by the installation of the first set of escalators, connecting the concourse and platform level.
Construction of the steel structure for the station's lower roof has also commenced, with the main roof expected to be installed in the second half of this year.
At the portal end of the site, and just above the tunnel entry/exit, brickwork for the first level of the multi-storey portal building has been completed allowing for the concrete slab of the next level to be poured.