Roadheaders

Roadheaders get to work between Woolloongabba and Boggo Road

Two roadheaders are now carving out the tunnel between Woolloongabba and Boggo Road stations in Brisbane, part of the Cross River Rail project.

The roadheaders will each travel 870 metres from Woolloongabba to Boggo Road, excavating 60 tonnes of rock per hour. Every day, the 115-tonne machines will progress between two to five metres, with tunnelling expected to be completed by the end of 2021.

Previously, the roadheaders were used to create the station caverns at Woolloongabba, and while tunnelling the machines will excavate three cross passages between the twin tunnels, as well as one temporary cross passage, said a Cross River Rail Delivery Authority (CRRDA) spokesperson.

“The roadheaders being used to excavate the project’s twin tunnels south to Boggo Road have been repurposed for extended use, having already been used to excavate the Woolloongabba station cavern.”

Unlike tunnelling on the rest of the project from Woolloongabba to Normanby, which is being carried out by two tunnel boring machines, the roadheaders are being used between Woolloongabba and Boggo Road due to the shallowness of this section of tunnel.

“Using roadheaders to tunnel south from Woolloongabba to Boggo Road is a more cost efficient and more suitable methodology given the tunnel section’s shorter length and shallower depth,” said the spokesperson.

“It isn’t feasible to use additional TBMs for this section, especially considering how long they take to assemble, test and disassemble.”

In a press conference to mark the beginning of construction on the future Exhibition Station, CRRDA Graeme Newton said after a year of construction, the project was meeting its targets.

“We’re working both above ground and below ground. The project is progressing very well and we’re on time and on budget.”

At the front of the roadheaders, the pineapple that brakes through rock will go through 30 picks during each eight-hour shift.

Major works continue on Cross River Rail

Throughout April, works will be progressing on the Cross River Rail project.

The CBGU joint venture, made up of CPB Contractors, BAM, Ghella, and UGL, will be carrying out the design and construction works for the Roma Street, Albert Street and Boggo Road stations.

At Roma Street, works will continue on the demolition of Hotel Jen, East and West Towers. This involves, the disconnection of utilities, scaffolding work, and structural demolition. Additionally, the former coach terminal access ramp will be demolishing during April and May 2020.

Tunnelling work at Roma Street is also taking place, with the establishment of the site progressing. Works include constructing the tunnel access shaft, installing an acoustic shed, and bringing in tunnelling plant and equipment.

At Albert Street, work will increase during April as piling begins on the demolished Lot 1 site. Excavation of the tunnel shaft will begin at Lot 2, and during this time piling finishes and an acoustic shed will be constructed. These works involve traffic and footpath closures on Mary Street and Albert Street.

Excavation work in the heart of the Brisbane CBD work will involve rock breaking, removal of excavated material, and ground stabilisation and retention work.

The underground Boggo Road station will be where the Cross River Rail project at its southern terminus connects to the existing rail network. During April, major works will continue there as the excavation of the station box begins. Site office buildings will be constructed onsite, along with internal roads and paths. Utility services will be relocated and some pedestrian movements will be disrupted. The play equipment at Outlook Park will be moved closer to Dutton Park State School.

All work on the Cross River Rail project will follow Australian and Queensland government health advice in relation to coronavirus (COVID-19), however as an essential service, work will continue as planned.