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WATCH: The first of two $20 million tunnel boring machines has arrived in Perth, to help build the $1.9 billion Forrestfield-Airport Link rail project.
The TBM arrived at the future site of Forrestfield Station last week.
It will be lowered into the dive structure at Forrestfield, and from July it will begin a two-year journey underground to Bayswater, where the new line will spur off the Midland Line.
The new rail line will provide a much-needed rail connection to Perth Airport, with stations for the Domestic and International terminals positioned along the route.
The TBM arrived at the Port of Henderson earlier this month, after spending nine months in China for initial assembly and testing.
It comes from German manufacturer Herrenknecht.
While the first TBM drills a seven-metre diameter, 8-kilometre tunnel from Forrestfield to Bayswater, the second TBM will drill the twin tunnel in the other direction.
“The TBMs use new dual-mode, variable-density technology, which is important given the varied ground conditions between Forrestfield and Bayswater,” state transport minister Rita Saffioti said.
“The machines will tunnel under Perth Airport and the Swan River, reaching depths of 25 metres, and the conditions underground on the route are incredibly diverse – ranging from sandy material to clay and rocks, all under water.”
The tunnel contract belongs to a joint venture of Salini Impregilo and NRW.
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