Tunnel boring machine - Share and Discover Knowledge on LinkedIn SlideShare

Bertha (Tunnel Boring Machine) o Bertha, also known as Big Bertha, is a 57-foot-diameter (17.4 m) tunnel boring machine o The biggest Tunnel Boring Machine on Earth o Tunnel Boring Machine built specifically for the Washington State Department of Alaskan ...

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Tunnel boring machine - Wikipedia

The first successful tunnelling shield was developed by Sir Marc Isambard Brunel to excavate the Thames Tunnel in 1825. However, this was only the invention of the shield concept and did not involve the construction of a complete tunnel boring machine, the digging ...

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Big Bertha -- world's largest tunnel boring machine -- facing big Seattle challenge - YouTube

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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Alaskan Way Viaduct - Follow Bertha - Washington State Department of Transportation

The SR 99 tunneling machine, nicknamed Bertha, has completed her work. For the latest tunnel progress, visit our new tracker page. An abbreviated history of Bertha ...

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Bertha TBM retrieval site | Bertha, the world's largest tunn… | Flickr

Bertha TBM retrieval site Bertha, the world's largest tunnel boring machine, has been stuck since December 2013 and was lifted to the surface in March 2015. Inside this canvas shed lies the front end of Bertha, where workers are inspecting and repairing ...

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Explore Big Bertha, Tunnel Boring Machine, and more!

The green, -foot cutting head for the tunnel-boring machine nicknamed Bertha is lowered into the ground at Sodo Friday. The work marks the latest milestone in the Highway 99 tunnel project. Boston beats Seattle in the Economy Bowl, too When it comes to the ...

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The WSDOT Blog - Washington State Department of Transportation: Follow Bertha's breakthrough

The tunneling machine Bertha will mine through the five-foot-thick concrete wall of the disassembly pit, ..., Bertha breakthrough, SR 99 tunnel, tunnel boring machine 38 comments: Andy Day said... How far has the TBM moved since 8 AM? Is it mining the Max D ...

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Bertha (tunnel boring machine) - Wikipedia

Some media have also referred to the machine as "Big Bertha". In March 2016, regional transit agency Sound Transit decided to drop names for its own tunnel boring machines, ...

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

We've covered the saga of the SR99 tunneling machine, better known as Bertha, since it broke down after only drilling though just 52 feet in three days of operation. Now the Seattle tunnel boring machine is finally back on track. It just broken through an access repair tunnel and has since mined 73

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Explore Big Bertha Tunnel Boring Machine -

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Seattle's long-broken tunnel-boring machine set to resume Nov. 23

Workers look on as they lift the machine head from Bertha, the world's largest tunnel-boring machine, from an access pit for repairs in Seattle, Washington March 30 ... SEATTLE (Reuters) - The world's largest-diameter tunneling machine could resume drilling under ...

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Bertha, Seattle's SR 99 Tunneling Machine, Is Finally Done Digging | WIRED

beleaguered boring behemoth clawed its way into daylight yesterday, leaving a 1.7-mile tunnel behind it. ... Bertha the tunneling machine broke through a new concrete wall into a disassembly pit. At first it was hard to see the machine's arrival ...

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The end is near for Bertha: After nearly 2 miles in 4 years, tunnel machine about to break through | The Seattle Times

Workers stand on top of the tunnel-boring machine Bertha, looking down at the exposed ring-shaped cutter drive that was lifted out and repaired, ...

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Bertha is drilling again: 8 feet done and 8,000 feet to go | Q13 FOX News

SEATTLE -- The boring machine Bertha has passed its first set of tests, since resuming tunneling along the Seattle waterfront. Seattle Tunnel Partners say crews started moving Bertha forward in its underground pit early Tuesday. They successfully drilled about 8 ...

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Big Bertha Is Digging Seattle's Massive Underground Freeway

To do so, Seattle's using "Big Bertha:" the biggest Tunnel Boring Machine on Earth. The A.V. Club Deadspin Earther Gizmodo Jalopnik Jezebel Kotaku Lifehacker Splinter The Takeout The Root The Onion Clickhole The Inventory ...

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Big Bertha's Two-Mile Subterranean Journey Is Almost Over

Bertha's Two-Mile Subterranean Journey Is Almost Over Get an inside look at how the machine is maintained, and how its cutter tools up front are replaced in a ... More than 150 feet below the streets of Seattle, Bertha presses on, boring a 57.5-foot diameter tunnel ...

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Bertha repair will take longer — there are lots of broken parts | The Seattle Times

Bertha, the world's biggest tunnel-boring machine, overheated and quit digging on Dec. 6, 2013. The machine is stuck near Pioneer Square, some 1,083 feet into the 9,270-foot route from Sodo to South Lake Union. The highway tunnel has lapsed two years behind ...

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Alaskan Way Viaduct - Tunneling - Washington State Department of Transportation

The tunneling machine known as Bertha began tunneling beneath Seattle in July 2013 (photo at right: ... + Bertha's tunnel route + Tunneling breakthrough and disassembly + How a tunneling machine works + Performing routine maintenance. + ...

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Watch Bertha, the world's largest tunnel boring machine, emerge from beneath Seattle – GeekWire

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. GeekWire was on site, waiting (watch ...

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The World's Largest Tunneling Machine Is (Finally) Getting Rescued

Bertha, the world's largest tunneling machine, has been stuck under downtown Seattle since it broke in December 2013. ... Bertha's tunnel was supposed to be completed by November of this year to replace an earthquake-prone section of the city's highway grit ...

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Bertha reaches daylight - Feb. 19, 2015 - YouTube

On Feb. 17, 2015, Bertha, the SR 99 tunneling machine, began mining into the southern wall of the pit crews will use to access and repair the machine. At mid...

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Bertha breaks through: World's largest boring machine completes tunnel under Seattle

The normally sedate city of Seattle sounded more like the set of a science fiction epic today as the world's largest boring machine roared and screeched its way into the open air. The tunnel boring machine, better known as "Bertha" cut through a wall of reinforced concrete in the shadow of the city

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