Emergency exit points
Cross passage connections have now been excavated to link our first emergency egress shaft (EES), off Abernethy Road, to both tunnels. The construction team is now preparing to install the waterproofing membrane and permanent concrete between the tunnel and the emergency egress shaft to finalise these works.
At our second EES excavation has now finished after reaching a final depth of 35m below ground level. Works will shift to construction of the base slab for the shaft, before this EES is also connected to the tunnels.
With the completion of jet grouting and core drilling at the third EES site, near Wright Crescent, works to construct the capping beam are underway. Excavation of the shaft can then begin.
Cross passages and emergency ergress shafts
The route for the Forrestfield-Airport Link includes 8km of twin-bored tunnels, with safe entry and exit points via underground stations at Redcliffe and Airport Central. Trains will enter the underground rail line via tunnel portals at Bayswater and Forrestfield.
Given the length of the tunnels, additional infrastructure is required between the stations to allow safe egress to the ground level in the event of an emergency, and access to the tunnels for maintenance. As such, 12 cross passages and three emergency egress shafts will be built along the alignment.
View the emergency exit points fact sheet.
The cross passages are located at numerous points along the route to provide a connection between the tunnels. In the unlikely event of an emergency, passengers will be able to exit the train and use the tunnel walkways to locate the nearest cross passage. They will then be able to enter the adjacent tunnel safely and exit through the nearest emergency egress shaft, station or dive structure.
Cross passages are constructed using the jet grouting process, a construction technique used to improve ground conditions and stabilise soils in preparation for tunnelling works.
Emergency egress shafts
Emergency egress shafts provide emergency exit points for passengers along the tunnel alignment. In the event of an incident, commuters will access the emergency egress shafts using the cross passages and walkways within the tunnel. They will then be able to use either the stairs or the lift contained within the emergency egress shaft to reach ground level emergency muster point.
Emergency egress shafts will be built in three locations along the alignment:
- Wright Crescent, Bayswater
- Woods Road, within the Terminal 3 & Terminal 4 Precinct
- Abernethy Road, Forrestfield