Austria is Digging a TUNNEL Like No Other - #48
The World's Best Construction Podcast
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The Safety of Tunneling
TBMs are used to dig through solid rock, which is safer than soil. Concrete segments at the back of the TBM get placed into the wall and create a tunnel around you. "It's not 100% safe, but it's a lot safer," says David Walliams. 'You've got these guys working basically inside this massivesolid rock hill'
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