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Tag: what stopped big Bertha
Construction Equipment
Tunnel-boring machine Big Bertha shut down for “months” due to complexity of needed repairs
Washington State Department of Transportation officials say Big Bertha, the world’s largest tunnel-boring machine, is likely out of commission for months. An inspection conducted after the machine overheated in late January found that several cutterhead openings were clogged with dirt along with considerable damage to seals around the machine’s main bearing, according to a report […]
February 11, 2014
Construction Equipment
Tunnel-boring machine Big Bertha moves forward 2 feet in test run to see if blockage is fully removed
After nearly two months of downtime caused by a steel pipe stuck in her teeth, Big Bertha, the world’s largest tunnel-boring machine, briefly went back to work beneath Seattle. According to a report from the Associated Press, the Washington State Transportation Department announced that Bertha moved two feet on Tuesday which was just enough progress […]
January 30, 2014
Construction Equipment
A steel pipe is what brought Big Bertha, the world’s largest tunnel-boring machine, to a halt
The mystery is solved—in part at least. After Big Bertha, the world’s largest tunnel-boring machine, was brought to an abrupt halt on December 6th, officials at the Washington State Department of Transportation were stumped as to what was in the way. Now they know that the obstruction is a large steel pipe. A steel pipe […]
January 6, 2014
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