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Reece's avatar

Great article! We also have different shapes of TBM these days like the "double O" and square designs!

https://en.wikipedia.org/wiki/Tunnelling_shield#/media/File:Shielded-machine.JPG

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Isaac King's avatar

I recently came across a very nice exploration of modern tunnel construction here: https://www.youtube.com/watch?v=6AV2NcyX7pk

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