Mega TBMs - TunnelTalk

The table below is a list of the world’s largest TBMs ... 1 Mitsubishi EPBM Ex-Bund Tunnel machine: ... The order from Hong Kong pushes the diameter of mega-TBMs ...

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Pictured: The world's most powerful tunnel-boring machine ... ... City starts work to rescue world's largest tunneling machine that broke down far beneath the streets.

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Tunnel boring machine - Wikipedia. A tunnel boring machine (TBM), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.They may also be used for microtunneling.

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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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The World's Largest Tunnel-Boring Machine ... a used and completely refurbished TBM can render the same good performances as a new tunnel boring machine ...

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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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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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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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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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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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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. John Blacksto...

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