Tag: tunnel-boring machines: Page 3

Construction Equipment

Another mystery overheats, halts tunnel-boring machine Big Bertha once more

The Washington State Department of Transportation officials in charge of the world’s largest tunnel-boring machine have another mystery on their hands deep below Seattle. After finally getting moving again last week following a two-month period of downtime, Big Bertha has been halted once again. This time, for a different, and unknown, reason. Workers put Bertha […]

February 4, 2014

Construction Equipment

Subway expansion in Delhi to set record with simultaneous use of 34 tunnel-boring machines

Seattle might have the world’s largest tunnel-boring machine, but Delhi, India will soon have a record-setting host of the machines at its disposal. Construction workers in India’s capital city have begun Phase III of the extremely complex task of extending the city’s subway system. How complex? The engineering team recently announced that it will be […]

June 28, 2013

Construction Equipment

Big Bertha, world’s largest tunnel-boring machine, lowered into starting position in Seattle

With the digging of the Washington State Route 99 tunnel in Seattle scheduled to start in July, the Washington State Department of Transportation recently lowered the head of Big Bertha, the world’s largest tunnel-boring machine, into the pit that will serve as its starting position. Bertha made her triumphant arrival in Seattle at the beginning of April […]

June 5, 2013