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A Tunnel boring machine was used for the construction.
East end construction began in August 1994 with a customized tunnel boring machine.
90% of the tunneling will be performed by a tunnel boring machine.
Construction began in the second half of 2007, and the tunnel boring machine started to operate in 2009.
Some of the sections under the airport required the use of a tunnel boring machine.
As such, even though it cost less than using a tunnel boring machine, the plan drew heavy criticism from area residents and businesses.
Method of construction: Tunnel boring machine, cut and cover, and surface.
Herrenknecht AG - makers of the tunnel boring machine used.
They drill and dynamite and these days deploy a 450-ton tunnel boring machine known as the mole.
The crossing under the main railway station is not done by the tunnel boring machine, but by manual digging.
There was local debate whether the tunnel should be built using a tunnel boring machine or by drilling and blasting.
The contractors used a tunnel boring machine manufactured by Mitsubishi Heavy Industries.
It is the first subway line in Canada that had plain tunnel sections built entirely by tunnel boring machine.
It is applied immediately behind the tunnel boring machine, to create a natural load-bearing ring and minimize the rock's deformation.
Video on how a Tunnel Boring Machine works
The other would be curved to pass through shale material, that would make the use of a tunnel boring machine an economical proposition.
Mole, a tunnel boring machine
It was excavated using a tunnel boring machine (TBM) that took over four years to bore its way through the mountain.
Tunnel boring machine
The European Space Agency had helped in engineering aspects of the tunnel project for the tunnel boring machine.
Earth Pressure Balance, see Tunnel boring machine
Most of the line is underground and built using the cut-and-cover method, with some sections built using a tunnel boring machine.
1998, the Robbins tunnel boring machine starts drilling at the Deep Cove end of the tunnel.
Tunnel Boring Machine
Construction is expected to be completed in 2013, and the tunnel boring machine's name, 'Busy Lizzie', was chosen via a competition open to local school children.
