World's Largest Tunneling Machine at Eldon Coaxum blog

World's Largest Tunneling Machine. Here's a look back on the tumultuous dig that's years. 10 in.), an overall length of 120 m (393 ft. With a huge shield diameter of 17.63 m (57 ft. Let’s start at ground zero: On april 4, the world's largest tunnel boring machine broke through to the open air after almost four years underground. 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. Big bertha was manufactured and supplied by the hitachi zosen corporation to seattle tunnel partners. 8 in.), and weighing weighs 4,850 tonnes (5,346 tons), according to the guinness world records, it.

World's largest tunneling machine gets name, face, voice
from www.seattlepi.com

8 in.), and weighing weighs 4,850 tonnes (5,346 tons), according to the guinness world records, it. With a huge shield diameter of 17.63 m (57 ft. Big bertha was manufactured and supplied by the hitachi zosen corporation to seattle tunnel partners. Let’s start at ground zero: 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. On april 4, the world's largest tunnel boring machine broke through to the open air after almost four years underground. 10 in.), an overall length of 120 m (393 ft. Here's a look back on the tumultuous dig that's years.

World's largest tunneling machine gets name, face, voice

World's Largest Tunneling Machine 10 in.), an overall length of 120 m (393 ft. Let’s start at ground zero: Here's a look back on the tumultuous dig that's years. Big bertha was manufactured and supplied by the hitachi zosen corporation to seattle tunnel partners. 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. With a huge shield diameter of 17.63 m (57 ft. 8 in.), and weighing weighs 4,850 tonnes (5,346 tons), according to the guinness world records, it. On april 4, the world's largest tunnel boring machine broke through to the open air after almost four years underground. 10 in.), an overall length of 120 m (393 ft.

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