In one of the project's biggest milestones to date, TBM Grace broke through into the underground station box at Airport Central Station on the evening of Tuesday May 8, 2018.
TBM Grace resumed tunnelling this month and has now successfully installed 1034 rings. The restart follows the completion of a comprehensive review into tunnelling operations.
Tunnel boring machines (TBMs) are large machines that excavate below the ground surface, while simultaneously installing concrete lining units to build a tunnel.
On March 28 the second of the Forrestfield-Airport Link’s two tunnel-boring machines was temporarily halted.
As we progress towards first trains using the Forrestfield Line in 2020, key infrastructure along the new alignment, including all three new stations, is now well into construction.