Redcliffe Community Zone
With the construction of the 150m-long, 25m-wide and 1.5m-deep base slab complete, preparation works continue for the arrival of the TBMs. These include construction of in-situ double segment blocks, which will support the TBMs and their 130m-long trailing gantries to be manoeuvred through the station box to where the cutterhead is to be lined up for the next section of tunnelling. The temporary segments will be removed once the TBMs have left the station.
Temporary service pipes have also been installed along the diaphragm walls. These pipes enable the supply of water and grout to the TBMs and allow excavated material from tunnelling operations to be channelled back to Forrestfield, where it is treated and reused where possible.
The arrival of the TBMs will see some changes in activity at the Redcliffe site. One of the main changes will be the commencement of 24-hour operations. An electric tower crane will be used to lower tunnel segments into the station box. Multi service vehicles (MSVs) will then transport the segments to the TBMs.
In preparation of the arrival of the tower crane a limestone pad has been constructed to provide a solid foundation.
Activity is ongoing at the site behind Central Avenue and Second Street homes, the location of the future car park. The area is currently being cleared to allow for the installation of a temporary fence, which will remain in place for around three months. A permanent 1.8m-high fence will then be installed, followed by drainage and asphalt. The car park will be used as a lay-down area until it is officially opened. The finishing touches, such as line markings and landscaping, will not be completed until later in the construction program.