bertha the world amp 39 s largest tunnel-boring machine

  • bertha world 039 s largest tunnel-boring machine

    bertha world 039 s largest tunnel-boring ... An unknown object that stopped the world's most powerful tunnel boring machine digging underneath Seattle has finally ...

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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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  • 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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  • Reanimating Bertha, the world's biggest tunnel-boring machine

    The world's biggest tunnel-boring machine, ... Seattle's tunnel even before Bertha ran into big trouble. The largest diameter tunnel-boring machine ever ...

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  • Seattle tunnel, among world's biggest, takes step toward ...

    Apr 03, 2017 · Workers make preparations to lift the cutting head from Bertha, the world's largest tunnel-boring machine, and lift it out for repairs in Seattle, Washington March 9, 2015.

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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, leaving the city's planned waterfront renaissance hanging in the balance.

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  • The world's biggest boring machine Bertha is taken out for ...

    The machine, known as Bertha, ... Contractors building a highway tunnel under Seattle are preparing to remove the world's largest boring machine so that it can be ...

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  • The rescue mission for Bertha, the world's largest tunnel ...

    The world's largest tunnel-boring machine has stalled deep beneath Seattle. There's only one way to finish the project. Bertha must be saved...

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  • Tunnel boring machine - Wikipedia

    A tunnel boring machine ... An earth pressure balance TBM known as Bertha with a bore diameter of 17.45 metres ... The world's largest hard rock TBM, ...

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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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  • Seattle Restarting Bertha, the Broken Tunnel Machine | Fortune

    Workers make preparations to lift the cutting head from Bertha, the world's largest tunnel-boring machine

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

    After a 2001 earthquake severely damaged the double-decker section of Seattle's Route 99 highway, state and city officials decided to move the main thoroughfare underground. In July, they unleashed Bertha, the world's largest-diameter tunnel-boring machine. Built in Japan and reassembled in the ...

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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.

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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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  • World's biggest tunnel machine Bertha emerges from beneath ...

    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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  • 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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  • 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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  • Watch Bertha, the world's largest tunnel boring machine ...

    Watch Bertha, the world's largest tunnel boring machine, emerge from beneath Seattle. by Kurt Schlosser on April 4, 2017 at 10:01 am April 4, 2017 at 4:42 pm.

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

    Big Bertha – world's largest tunnel boring machine – facing ... Named after one of Seattle's early mayors, the $80 million drill Big Bertha is 326 feet long, weighs 6,700 tons, and does much more than drill.

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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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  • Bertha The World's Largest Tunnel-boring Machine - Image Results

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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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  • Watch: Bertha breaks through Seattle waterfront tunnel ...

    Bertha, the world's largest tunnel-boring machine, completely broke through the north end of the tunnel shortly before noon Tuesday, April, 4 2017. 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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  • 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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  • Bertha The World's Largest Tunnel-boring Machine - Video Results

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