Watch Bertha, the world’s largest tunnel boring machine, emerge from beneath Seattle
Watch Bertha, the world’s largest tunnel boring machine, emerge fro…
Apr 4, 2017
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China unveils 5,000 metric ton-heavy tunnel boring machine with largest-diameter
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Bertha breaks through: World's largest boring machine completes tunnel under Seattle
Bertha breaks through: World's largest boring machine complete…
Apr 5, 2017
newatlas.com
World's largest tunneling machine digs in
World's largest tunneling machine digs in
Aug 2, 2013
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1.2M views · 4.4K reactions | A look at how you dismantle and remove the largest tunnel boring machines in the southern hemisphere piece by piece. Work also continues fitting out the twin tunnels inside with the 3-lane road cars will use both ways and the ventilation systems. | West Gate Tunnel Project | Facebook
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15K views · 1.1K reactions | A tunnel boring machine with an excavation diameter of 16.15 meters began drilling the largest-diameter shield tunnel in southeast China's Fujian on Sunday, which spans 3.29 km on the Xiamen section of the Xiamen-Kinmen Bridge. Upon completion, the 17.34-km-long Xiamen section is expected to provide more efficient access to Xiamen Xiang'an International Airport. | VideoChina | Facebook
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