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Jun 25, 2017 · Bertha, the world's largest tunneling machine, officially started the 2-mile journey beneath downtown on July 30, 2013. Bertha will push forward slowly at ...

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Bertha's on her way | Bertha, the world’s largest

Jul 30, 2013 · Bertha's on her way Bertha, the world’s largest tunneling machine, officially started the 2-mile journey beneath downtown on July 30, 2013.

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A tunnel boring machine ... This is because tunneling with TBMs is much more efficient and results in shortened completion ... The world's largest hard rock TBM, ...

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The World's Largest Tunneling Machine Is … Bertha, the world's largest tunneling machine, has been stuck under downtown Seattle since it broke in December 2013.

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The World's Largest Tunnel-Boring Machine Must Be

Bertha was built by heavy-machine-maker Hitachi Zosen of Japan, which had constructed more than 1,300 tunneling machines before her. Once she steamed into Seattle in 41 pieces in April 2013, her five-story, Sonics-green cutterhead became recognized around

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Watch Bertha, the world’s largest tunnel boring machine

Watch Bertha, the world’s largest ... Workers emerge from behind the tunnel machine’s cutterhead after Bertha punched through the ... of the tunneling operation a ...

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World’s largest tunnel-boring machine finally breaks through

SEATTLE — The world’s largest tunnel-boring machine broke through a ... World’s largest tunnel-boring machine finally ... as the machine, known as Bertha, ...

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Bye-Bye to Bertha, the world’s largest tunneling machine

Aug 22, 2017 · This time-lapse video captures the difficult and challenging work to disassemble the world’s largest-diameter tunneling machine. For four months, crews cut, ...

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Bertha The World's Largest Tunneling Machine - Image Results

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How does the world’s largest tunneling machine work? Take a

SEATTLE - The world’s largest tunneling machine, Bertha, is a complex machine. Now, residents around the sound are getting a look at how it works. An animated video created by Bertha’s manufacturer, Hitachi Zosen Corp.

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bertha world's largest tunnel-boring machine - Cutting Head

Big Bertha -- world's largest tunnel boring machine ... It was the world's biggest tunneling machine when it first chewed into the loose dirt and gravel on Seattle's ...

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Something Called "The Object" Stops World's Largest Tunneling ... 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 amp amp 39 s largest tunnel-boring machine ... World''s Largest Digging Machine Is Huge - gaurgrandeur.co.in. Big Bertha, the world's largest tunneling machine, is currently at rest underneath Seattle, ...

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World''s Largest Digging Machine Is Huge - gaurgrandeur.co.in. Big Bertha, the world's largest tunneling machine, is currently at rest underneath Seattle, ...

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

Seattle's Big Bertha Tunneling Machine Is Finally Back on Track. ... Five stories tall and the biggest drill of her kind, Bertha overheated in December 2013, ...

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