#tunnel

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What Lies Beneath: Excavating Crossrail's tunnels | In-depth | The Engineer
Dead link Public

http://www.theengineer.co.uk/in-depth/the-big-stor...

This is fascinating reading. Example facts from this piece: tunnel boring machines go at about 100m...

#engineering #london #underground #tunnel
alasdairw Apr 02, 2012