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largest tunnel boring machines

They're Finally Freeing Bertha, the Biggest Tunnel-Boring ...

They're Finally Freeing Bertha, the Biggest Tunnel-Boring Machine in the World Seattle's big machine has been stuck underground since the end of 2013

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largest tunnel boring machines

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 ...

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largest tunnel boring machines

The largest tunnel boring machine (TBM) in the world finished ...

The tunnel will become a double-decker highway, scheduled to open in 2019 It was in April of 2013 that the 57-foot wide boring machine arrived in Seat...

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largest tunnel boring machines

Largest Tunnel Boring Machines - Image Results

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largest tunnel boring machines

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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largest tunnel boring machines

Tunnel Boring Machines - The Robbins Company

Tunnel Boring Machines Products. TBMs Main Beam ... The Robbins Company revolutionized tunnel construction when our engineers designed the first hard rock TBM and we ...

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largest tunnel boring machines

Gizmag goes inside the world's largest tunnel boring machine

On Saturday, a tunnel boring machine (TBM) so large that it looks like something out of Thunderbirds was dedicated in the city of Seattle. "Bertha," as it's known, is the world's largest TBM and will spend the next 14 months boring a 1.7 mile (2.7 km) tunnel under the city as part of a US$3.1 billion project to replace a viaduct damaged in a 2001 earthquake.

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largest tunnel boring machines

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

It has been a long, yet short and strange trip. Bertha, which at 57.5 feet in diameter was the world's largest tunnel-boring machine when it entered the ground, ends its four-year, 1.7-mile odyssey beneath Seattle today, its job to dig a new vehicle tunnel completed.

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largest tunnel boring machines

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 ...

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largest tunnel boring machines

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

Bertha broke down under the city of Seattle after striking an eight-inch steel pipe while drilling a tunnel ... largest tunneling machine ... boring machine, ...

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largest tunnel boring machines

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

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 weighs in at 900 tons.

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largest tunnel boring machines

Barnhart Crane & Rigging

One of Barnhart's largest lifts ever took place in Seattle and involved the world's largest tunnel-boring machine. In early April, the $80 million machine arrived at the Port of Seattle from Osaka, Japan to help dig a tunnel beneath Seattle as part of the project to replace the Alaskan Way Viaduct.

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largest tunnel boring machines

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. ... Instead of building a tunnel, ...

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largest tunnel boring machines

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 ...

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largest tunnel boring machines

Bertha (tunnel boring machine) - Wikipedia

Bertha is a 57-foot-diameter (17.4 m) tunnel boring machine built specifically for the Washington State Department of Transportation's (WSDOT) Alaskan Way Viaduct replacement tunnel project in Seattle. It was made by Hitachi Zosen Sakai Works in Osaka, Japan, and the machine's assembly was completed in Seattle in June 2013.

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largest tunnel boring machines

Big Bertha -- world's largest tunnel boring machine -- facing ...

Dec 24, 2013 · 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. John ...

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largest tunnel boring machines

Sand Grinds World's Largest Tunneling Machine To A Halt

Feb 28, 2014 · 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 ...

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largest tunnel boring machines

Tunnel boring machine - Wikipedia

A tunnel boring machine (TBM), ... tunnel route and has installed 1,270 of 1,426 concrete tunnel rings. The world's largest hard rock TBM, known as Martina, ...

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largest tunnel boring machines

Fly Through the Massive Tunnel They're Carving Under Seattle

Life has not been entirely kind to Bertha, the largest tunnel boring machine in all of North America. About two years ago, the machine, which measures 57 feet tall and 325 feet long, started excavating a two-mile tunnel under downtown Seattle. Seven months later, it ground to a halt, stuck. It had moved all of 1,000 feet.

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largest tunnel boring machines

World's largest tunnel boring machine lands in Seattle ...

Known affectionately as Bertha, this tunnel boring machine has the widest diameter of any boring machine ever built; 57.5 feet. It's being used to dig a highway tunnel under downtown Seattle and it just arrived there today after being shipped from Japan.

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largest tunnel boring machines

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

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

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largest tunnel boring machines

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

Apr 03, 2017 · SEATTLE (Reuters) - Bertha, one of the world's largest tunnel boring machines, emerged north of downtown Seattle on Tuesday shrouded in clouds of dust and chunks of falling concrete, completing the most difficult phase of a plan to build a highway under the heart of the city.

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largest tunnel boring machines

They're Finally Freeing Bertha, the Biggest Tunnel-Boring ...

They're Finally Freeing Bertha, the Biggest Tunnel-Boring Machine in the World Seattle's big machine has been stuck underground since the end of 2013

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largest tunnel boring machines

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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largest tunnel boring machines

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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