Tunneling Machine Busts Through | Construction Equipment

Nov 9, 2015 ... A tunneling machine working on Seattle's future U District light-rail station broke through last week, and the event was captured on video by the ...

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Hard grind: The epic journey of the world's biggest tunnel boring ...

Apr 30, 2017 ... Bertha is the largest tunnel boring machine ever built(Credit: WSDOT) ... It was expensive, but it seems to have done the job, with one exception – the Alaska Way Viaduct. ..... Then on December 6, things really got bad. ... m) behind the TBM, causing another shutdown for six weeks as 250 yards of concrete ...

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We Finally Found What's Blocking The World's Largest Tunneling ...

Jan 3, 2014 ... Ever since the colossal machine tunneling under Seattle, nicknamed Bertha, was stopped in its tracks, there's been a frenzied speculation ...

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Sand Grinds World's Largest Tunneling Machine To A Halt : NPR

Mar 1, 2014 ... Now a rescue plan is underway to fix the five-story-tall machine. ... Book Reviews · This Week's Must Read · My Guilty Pleasure · Three Books. ... The Seattle tunneling machine known as Bertha, which started its ... That's bad.

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World's largest boring machine begins digging 2-mile underground ...

Jul 30, 2013 ... The world's largest boring machine began drilling a nearly 2-mile ... I need to have a few of these in place for leverage before I can start ... It's not bad, I suppose – feels sort of like a bug bite. pic.twitter.com/GC0147jowe ... Watch Bertha, the world's largest tunnel boring machine, emerge from beneath Seattle.

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