worlds largest tunneling machines

  • World's Largest Tunneling Machines - Image Results

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

    Here's what is blocking Bertha, the world's largest tunneling machine. ... Watch Bertha, the world's largest tunnel boring machine, emerge from beneath Seattle.

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  • Bertha (tunnel boring machine) - Wikipedia

    Bertha resumed tunneling ... regional transit agency Sound Transit decided to drop names for its own tunnel boring machines, ... and is the world's largest earth ...

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  • 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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  • World's Largest Tunneling Machines - Video Results

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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. She's quite hefty too. Bertha is assembled from 41 parts, the largest of which ...

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    HDD Boring Machines ... Watch video · Engineers are still desperately trying to rescue the world's largest tunneling machine that is stuck under the city of Seattle.

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  • Pictured: The world's most powerful tunnel-boring machine ...

    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. But ...

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  • world's largest tunnel boring machine - danceemporium.org

    Alaskan Way Viaduct - Tunneling. The SR 99 Alaskan Way Viaduct, an elevated concrete structure built in the 1950s and vulnerable to earthquakes, is being replaced with a 1.7-mile tunnel running ...

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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. And yesterday, the Bertha's broken cutter head was finally ...

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

    From the dark depths beneath Seattle, Bertha the SR 99 tunnel machine headed out of the muck and into daylight on Tuesday, completing a final push in a years-long effort to create space for a new highway beneath the city.

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

    On Saturday,the world's largest tunnel boring machine was ... though instead of machines, ... Having two erector arms is unusual for a tunneling machine and allows it ...

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

    Contractors working for the state of Washington are planning a high-stakes operation to rescue Bertha — the world's largest tunneling machine. Bertha is supposed to be boring a 2-mile highway tunnel under downtown Seattle, but it got stuck in December. Bertha is on Seattle's waterfront, between ...

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  • Tunnel boring machine - Wikipedia

    This is because tunneling with TBMs ... 2013), Chapter 7: Tunnel-boring machines: History of tunnel-boring machine ... 2.M-30 EPB Tunnel Boring Machine - the largest ...

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  • America's Biggest Tunnel-Boring Machine Is Stuck Beneath Seattle

    America's Biggest Tunnel-Boring Machine Is Stuck Beneath Seattle ... Poor Bertha. North America's largest tunnel-boring ... (these machines can chomp dirt and ...

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  • World Highways - World's largest tunnel boring machine

    Russian operator company NCC (Nevskaya Concession Company) has placed an order with German manufacturer Herrenknecht for the world's largest tunnel boring machine (TBM).

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