The World's Largest Tunnel Boring Machine: A 400-Foot, 9.5-Million Pound Mechanical Earthworm [Monster Machines]

We've been thinking a lot today about moving earth to make pathways. Tunnels. What if you're not talking about thin, dirt tubes to move humans, though, but holes so big entire industries can flow through them? This is the world's largest tunnel boring machine: an Earth Pressure Balance (EPB) Shield developed by Herrenknecht AG. More »

Source: http://feeds.gawker.com/~r/gizmodo/full/~3/2AXPuhJYsmY/the-worlds-largest-tunnel-boring-machine-a-400+foot-95+million-pound-mechanical-earthworm

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