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bertha tunneling machine

KAMY is the worldwide leader in manufacturing hydraulic cutters, road headers, tunnel support systems, and other specialized machinery used in the tunneling, mining, and construction industries. Through KAMY’s years of experience and innovative thinking, we can provide custom engineered solutions for nearly any project requiring rock excavation or concrete demolition.

KAMY is the leading manufacturer of roadheaders in the weight class of 13-80 tons weight. Our roadheaders offer interchangeable cutter heads, both transverse and axial and are custom engraved for each project. Our hydraulic cutters are suitable for material with uniaxial compressive strength ranging from 500 to 25,000 pounds per square inch. All of our products can be utilized in a variety of applications from rock excavation, trenching, demolition and concrete, to underwater cutting, tunneling, and scaling.

Bertha (tunnel boring machine) - Wikipedia

Apr 04, 2017 · 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 through clouds of dust.

Alaskan Way Viaduct - Follow Bertha

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 ...

Bertha, Seattle's SR 99 Tunneling Machine, Is Finally Done ...

Bertha, the world’s largest tunneling machine, has been stuck under downtown Seattle since it broke in December 2013. Engineers have had to concoct a massive and expensive rescue plan—essentially a whole construction project in itself. And yesterday, the Bertha’s broken cutter head was finally ...

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

The contractor Seattle Tunnel Partners began mining around 8 a.m. this morning. The tunneling machine Bertha will mine through the five-foot-thick concrete wall of the disassembly pit, an effort that is expected to take several hours.

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

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.

Follow Bertha's breakthrough - The WSDOT Blog

The tunneling machine known as Bertha began tunneling beneath Seattle in July 2013 (photo at right: the machine's cutterhead being lowered into the launch pit near Seattle's stadiums). The machine completed its tunneling on April 4, 2017 and was fully dismantled and removed from the tunnel on Aug. 23, 2017.

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

The biggest tunnel-boring machine ever to get stuck under Seattle. More than six months after Bertha had stopped her daily tunneling, I headed down to Seattle's historic Pioneer Square neighborhood to see her sulking in her hole; I wanted to see the plans that were afoot to get her moving again. Just to the west nodded the dromedary cranes of …

Alaskan Way Viaduct - Tunneling

Dec 25, 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 Blacksto...

The World's Largest Tunnel-Boring Machine Must Be Saved

Read more about the technical challenges and rising costs of the Highway 99 tunnel project, and the successes and travails of Bertha, the biggest-ever boring machine.

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