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The world s largest tunnel boring machine nicknamed Bertha has been stuck beneath Seattle for over a year amid its efforts to build a pathway for an underground highway to replace one that is currently obstructing the city s waterfront

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Welcoming Bertha the World s Biggest Tunnel Boring Machine The world s largest diameter tunnel boring machine TBM is travelling all the way from Osaka Japan to dig the two mile long tunnel that will replace the Alaskan Way Viaduct

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On April 4 the world s largest tunnel boring machine broke through to the open air after almost four years underground Called Bertha the giant digger was tasked with the challenge of building a tunnel large enough to carry four

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Bertha tunnel boring machine Japan and is the world s largest earth pressure balance tunnel boring machine at a cutterhead diameter of feet

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Big Bertha world s largest tunnel world 039 s largest tunnel boring machine the progress of the biggest diameter tunnel boring machine in use Bertha s

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world 039 s largest tunnel boring machine Made by Kamy The world s biggest boring machine Bertha is taken out for The machine known as Bertha

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Bertha the world s largest tunnel boring machine completely broke through the north end of the tunnel shortly before noon Tuesday April 4 2024 Bertha has broken through The world s largest tunnel boring machine completely broke through the north end of the tunnel shortly before noon Tuesday

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Bertha the world s largest tunneling machine bertha world 039 s largest tunnel boring machine Some of the world s largest machines were originally

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Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka Japan and is the world s largest earth pressure balance tunnel boring machine at a cutterhead diameter of feet m across

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On April 4 the world s largest tunnel boring machine broke through to the open air after almost four years underground Called Bertha the giant digger was tasked with the challenge of building a tunnel

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seattle 039 s bertha tunneling machine On April 4 the world s largest tunnel boring machine broke through to the open air after almost four years underground

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Bertha the world s largest tunneling machine has been stuck under downtown Seattle since it broke in December 2024 Engineers have had to concoct a massive and expensive rescue plan—essentially a whole construction project in itself

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Bertha tunnel boring machine Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka Japan and is the world s largest earth pressure balance tunnel boring machine at a cutterhead diameter of feet m across

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gizmag goes inside the world 039 s largest tunnel boring machine Get a 360 Degree Tour of Seattle s Gargantuan Tunneling Machine Seattle s Bertha tunneling

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bertha the world 039 s largest tunnel boring machine EBH120 Roadheader for mining copper In July 2024 Xinjiang Jiugan Peng Mining Co Ltd rented one EBH120 roadheader machine for the construction of Wuqia county copper mine tunnel

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Engineers are still desperately trying to rescue the world s largest tunneling machine that is stuck under the city of Seattle Bertha a five story high drilling machine that was custom built to drill the Alaska Way ground to a halt in December after stopped by an 8 inch diameter steel pipe