Posted On: 12/26/2013 11:08:12 AM
Post# of 63835
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BigBertha world's largest tunnel boring machine -- facing big Seattle challenge
Named after one of Seattle's early mayors, the $80 million drill Big Bertha is 326 feet long, weighs 6700 tons, and does much ...
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SR 99 Tunneling machine animation (2013)
Courtesy of Hitachi Zosen Corp., this animation shows how the world's largest tunneling machine works.
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Jumbo transports largest tunnel boring machine 'Bertha'
Today, 3rd April 2013, Mv Fairpartner will commence discharging the largest tunnel boring machine (TBM) ever made at the port ...
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