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.
Forrestfield has taken its first delivery of rail, with almost 9000 metres unloaded to date. Sections of rail will be welded together before installation commences in the first half of next year.
Fit-out works are ongoing at both sections of the station building. In-wall services at the southern building are approximately 95 per cent complete, with the northern section still requiring a bit of work.. External cladding has been installed at both sections.
Installation of steel columns, which will support the upper roof section, has commenced at platform level. Also at platform level, a number of pods, or rooms, are being fitted out, with works including ducting work for air conditioning systems, cabling for electrical and communications systems, and modules for the toilet systems. The pods are located under the main escalators and will be used for equipment storage.
At the portal building, located above the tunnel entry and exit points, external cladding has been fixed to the steel framework, which finalises construction of the building superstructure.