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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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Bertha (tunnel boring machine) - Wikipedia. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and is the world's largest earth pressure balance tunnel boring machine, at a cutterhead diameter of 57.5 feet (17.5 m) across.

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Secrets of the World’s Super-Explorers - Narratively

The mouth of the tunnel is wide and dark, swallowing the light and all that breathes. Rubble is scattered along the train tracks, bordered by retaining walls covered in numerous layers of graffiti.

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My Not-So-Rosy View of the World's Largest Redhead Festival

The mouth of the tunnel is wide and dark, swallowing the light and all that breathes. Rubble is scattered along the train tracks, bordered by retaining walls covered in numerous layers of graffiti.

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London's most boring project: £14.8bn Crossrail tunnel takes

London's most boring project: £14.8bn Crossrail tunnel takes shape below capital... but they've been going three years and are still only a fifth of the way through

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Changing The Teeth On The World’s Largest Tunnel-Boring

Next year, workers will start digging a 1.7-mile tunnel underneath downtown Seattle using the world’s largest tunnel-boring machine. The 57.5-foot-diameter, $80-million drill, which is currently under construction for the State Route 99 project, has about

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This Chinese Company Wants to Be the Best at Boring - Motherboard. Mar 5, 2017 ... Inside the state-owned company trying to build the world's tunnels. ... of the planet's top producers of high-tech tunnel-boring machines, or TBMs—in essence, giant drills

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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 machin

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A rare inside look at family-controlled global construction giant Bechtel. Fourteen stories below Saudi Arabia's Capital, Riyadh, a 1,000-ton monster is carving a hole. The tunnel-boring machine, or TBM, is longer than a Boeing 747 and weighs five times a

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Elon Musk's Boring Company reveal first tunneling machine

Earlier this year MailOnline exclusively revealed images of Musk's tunnel, which his 'Boring Company' has begun digging just outside his SpaceX headquarters in Hawthorne, California.

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