big bertha tunnel boring machine

big bertha tunnel boring machine

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.

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.

Big Bertha Tunnel Boring Machine - Video Results

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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 Blackstone reports on what the high-tech ...

Alaskan Way Viaduct - Follow Bertha

Follow Bertha Thank you for following Bertha. The SR 99 tunneling machine, nicknamed Bertha, has completed her work. For the latest tunnel progress, visit our new tracker page.

Big Bertha Tunnel Boring Machine - Image Results

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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 ...

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 ...

Watch Bertha, the world’s largest tunnel boring machine ...

Watch Bertha, the world’s largest tunnel boring machine, emerge from beneath Seattle by Kurt Schlosser on April 4, 2017 at 10:01 am April 4, 2017 at 4:42 pm Comments 15 Share 20 Tweet Share ...

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. ... Big Bertha – world’s largest tunnel borin ...

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

Currently, Bertha is the largest diameter tunnel boring machine in the world, though a slightly larger one (by about a quarter foot) was used last year in China for a short section of tunnel ...

Bertha breaks through: World's largest boring machine ...

The tunnel boring machine, better known as "Bertha" cut through a wall of reinforced concrete in the shadow of the city's iconic Space Needle at about 11:15 am, completing the last few feet of a ...

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 ...

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About KAMY

KAMY series of Roadheaders offers the best cutting performance in a wide range of rock formations. Equipped with geometrically optimized transverse or longitudinal cutter heads, these flexible machines can be used to excavate subway tunnels, road tunnels, railway tunnels and water tunnels without using explosives.