Brisbane takes delivery of second TBM
Brisbane takes delivery of second TBM Apr 2010
Project news release
The second Herrenknecht TBM for the Brisbane Airport Link has arrived in Brisbane to complete another step towards launch of TBM tunnelling on the project this year.

Components of TBM two being off-loaded at the port

Queensland's Minister for Infrastructure and Planning, Stirling Hinchliffe, the political champion of the project, said that the 12.48m diameter machine is "now being unloaded from the ship at Port of Brisbane for delivery to the Kalinga Park worksite where it will join the first machine which arrived in November last year. Once assembled in the bottom of the shaft, the first TBM will start boring in late June 2010 and of the second one a month later."
Project Director, Gordon Ralph said: "The two TBMs are EPB design and are valued at Aust$45 million each. They will encounter soft ground conditions with a mix of rock, sand and gravel when they launch from the 106m long x 20m deep Kalinga Park working shaft in Clayfield and will have the ability to cut through hard rock."

Shotcreting at Truro Street top heading

The Airport Link comprises twin 5.1km long road tunnels, and the two TBMs will be used to excavate the section of tunnel between Clayfield and Lutwyche.
The Airport Link project is being constructed together with the Northern Busway (Windsor to Kedron), requiring a total of 15km of road and busway tunnels and their connecting ramps.
One quarter of the total underground alignment is now complete by constructor Thiess John Holland with 4km of cut-and-cover and conventional roadheader tunnelling advanced from job sites at Bowen Hills, Windsor and Kedron.
At the Bowen Hills site 24 hour hoadheaher tunnelling with rockbolting and shotcreting has advanced about 650m in the northbound tunnel and about 400m in the southbound tunnel with excavation for the southbound tunnel portal also almost complete.
At the Windsor presinct, 60m of the northbound tunnel for the Northern Busway from the Truro Street site is complete and tunnelling northbound and southbound from the Truro Street site for the Airport Link highway tunnels is more than 2km advanced. In the coming weeks, tunnelling from Chalk Street site for Northern Busway will commence.

Construction of the acoustic shed and pre-assembly of TBM components at Kalinga Park worksite

At Kalinga Park, 24/7 work continues for concreting the TBM launch box and erecting the TBM shed over the working shaft. Pre-assembly of TBM components is also progressing along with installation of tunnel support facilities including the mechanical and electrical workshop, silos, a grout plant, water storage tanks, cooling plant and compressor station. Day and night work excavation of a large jacking pit on the eastern side of the railway for installation of canopy tube presupport beneath the eastern side of the railway line in Kalinga Park ahead of TBM tunnelling is progressing. Construction of the TBM overland conveyor system along the southern side of Schulz Canal, from Kalinga Park to Nudgee Road is also underway as is installation of diaphragm walls and concreting work to form the roof slab for the Airport Link cut and cover tunnel structure and ventilation station within the Kalinga Park worksite.
When completed, in 2012, the full project, which includes major surface and flyover sections in aggition to the substantial subsurface work, will be the first major motorway connecting Brisbane city with the airport and northern suburbs, avoiding up to 18 sets of traffic lights.


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