bertha the world amp 39 s largest tunneling machine

  • Bertha (tunnel boring machine) - Wikipedia

    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 57.5 feet (17.5 m) across.

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  • Bertha – The World's Largest Tunnel Boring Machine - GeoPrac.net

    Perhaps you've heard of Bertha, the World's Largest Tunnel Boring Machine or TBM? She's currently working her way underneath Downtown Seattle, excavating the Alaska Way Bored Tunnel to replace the aging Alaska Way Viaduct.

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  • The World's Largest Tunneling Machine Is (Finally) Getting ...

    Bertha, the world's largest tunneling machine, has been stuck under downtown Seattle since it broke in December 2013. Engineers have had to concoct a massive and expensive rescue plan—essentially a whole construction project in itself.

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  • Sand Grinds World's Largest Tunneling Machine To A Halt

    Sand Grinds World's Largest Tunneling Machine To A Halt Bertha, which got stuck digging a Seattle highway tunnel, is 60 feet below ground and can't move forward — or backward.

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  • The World's Largest Tunnel-Boring Machine | Popular Science

    The World's Largest Tunnel-Boring Machine. ... the world's largest-diameter tunnel-boring machine. ... Bertha is digging the 1.7-mile tunnel by advancing at an ...

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  • The World's Largest Tunnel-Boring Machine Must Be Saved

    The World's Largest Tunnel-Boring Machine Must Be Saved. Bertha has stalled deep beneath Seattle, ... What do you do when the world's largest tunneling machine is, ...

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  • Big Bertha, world's largest tunnel-boring machine, arrives in ...

    The "Big" in Bertha's name isn't there for the catchiness. It's there because it's apt. With a 57-foot diameter and a length of a football field, Big Bertha is the world's largest tunnel-boring machine.

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  • Gizmag goes inside the world's largest tunnel boring machine

    On Saturday,the world's largest tunnel boring machine was dedicated in the city of Seattle. "Bertha," as it's known, will spend the next 14 months boring a 1.7 mile (2.7 km) tunnel under the city to replace a viaduct damaged in a 2001 earthquake.

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  • Animation on how Bertha, Worlds Largest Tunneling Machine ...

    reddit: the front page of the internet ... Worlds Largest Tunneling Machine, works. Bertha is currently being blocked by an "object" in Seattle, WA. (youtube.com)

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  • Alaskan Way Viaduct - Follow Bertha

    Follow Bertha Thank you for following Bertha. The SR 99 tunneling machine, nicknamed Bertha, has completed her work. For the latest tunnel progress, visit our new tracker page.

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  • World's biggest tunnel machine Bertha emerges from ... - Autoblog

    Bertha, the world's largest tunnel-boring machine, ends its journey today. It has spent four years traveling less than two miles to build a new car tunnel underneath Seattle.

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  • Seattle's Big Bertha Tunneling Machine Is Finally Back on Track

    We've covered the saga of the SR99 tunneling machine, better known as Bertha, since it broke down after only drilling though just 52 feet in three days of operation. Now the Seattle tunnel boring machine is finally back on track. It just broken through an access repair tunnel and has since mined 73 ...

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  • bertha world's largest tunneling machine

    bertha world's largest tunneling machine. We are the manufacturer of coal mining machine,roadheader,coal loader,tunnel mucking loader,backfilling machine,concerte pumping machine and so on. bertha world's largest tunneling machine manufacturer, supplier.

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  • The World's Largest Tunneling Machine - Governing

    The World's Largest Tunneling Machine The 7,000-ton machine, named after Seattle's first female mayor, is ... Pieces of the Bertha tunneling machine, ...

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  • Alaskan Way Viaduct - Tunneling

    The tunneling machine known as Bertha began tunneling beneath Seattle in July 2013 (photo at right: ...

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  • world's largest tunnel-boring machine | Equipment World ...

    world's largest tunnel-boring machine . ... The last piece of Bertha, the world's largest tunneling machine, has been removed from Seattle's SR 99 tunnel, ...

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

    Bertha, the world's largest tunneling machine, churning through the rock and mud beneath Seattle, has hit a mysterious roadblock—so mysterious, it is only known for now as "the object."

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  • Bertha, the world's biggest tunneling machine ... - CityMetric

    Meet Bertha: Bertha is the world's largest tunnel boring machine. She weighs 7,000 tons and, at 17.5 metres tall, is roughly the height of a three storey house.

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  • bertha world 039 s largest tunnel,Mining Coal,PMTBM

    Feb 28, 2014 · Sand Grinds World's Largest Tunneling Machine To A Halt Bertha, ... Here's what is blocking Bertha, the world's largest tunneling ...

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  • The World's Largest EPB Shield Tunneling Machine | Hitachi ...

    Manufacturing & Engineering Hitachi Zosen Corporation. ... The world's largest shield tunneling machine was officially named Bertha on December 20, ... Bertha, the ...

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  • World's largest tunnel-boring machine finally breaks through

    SEATTLE — The world's largest tunnel-boring machine broke through a concrete wall beneath Seattle on Tuesday to reach the end of its long, troubled...

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

    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 lanes of motor traffic under the heart of Seattle.

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  • Bertha's breakthrough just 'halftime' for tunnel project ...

    The world's largest tunnel drill spent Tuesday morning kicking up dust ... Bertha's breakthrough just 'halftime' for tunnel ... Tunnel machine Bertha breaks ...

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  • Here's what is blocking Bertha, the world's largest tunneling ...

    Bertha, the world's biggest tunnel-boring machine currently underneath Seattle, has been stuck for nearly one month. Now, crews are close to figuring out what exactly is stopping her.

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  • bertha world's largest tunnel-boring machine

    bertha world's largest tunnel-boring machine. We are the manufacturer of coal mining machine,roadheader,coal loader,tunnel mucking loader,backfilling machine,concerte pumping machine and so on. bertha world's largest tunnel-boring machine manufacturer, supplier.

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