Tunnel boring machine

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A tunnel boring machine that was used at Yucca Mountain nuclear waste repository

A tunnel boring machine (TBM) also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata. They can bore through anything from hard rock to sand. Tunnel diameters can range from a metre (done with micro-TBMs) to 19.25 m to date. Tunnels of less than a metre or so in diameter are typically done using trenchless construction methods or horizontal directional drilling rather than TBMs.

• See also: Wikipedia, Commons

• Related: New Austrian Tunnelling method, Subterrene, Tunnel, Tunnelling shield, Trenchless technology

2.M-30 EPB Tunnel Boring Machine - the largest bui... 2.M-30 EPB Tunnel Boring Machine - the largest built in the world www.urbanscraper.com/search/label/TUNELADORA - Web

Video on how a Tunnel Boring Machine works Video on how a Tunnel Boring Machine works www.youtube.com/user/TheRobbinsCo#p/u/15/J0YqpZCoYEQ - Web

Crossrail tunnel boring machines Crossrail tunnel boring machines www.crossrail.co.uk/route/tunnelling/tunnel-boring-machines - Web

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