The Bertha Tunnel Boring

  • bertha world's largest earth pressure balance tunnel

    bertha was designed and manufactured by zosen sakai works and is the world's largest earth pressure balance tunnel boring machine, at a cutterhead diameter of 57.5 feet (17.5 m) across, 326 feet (99 m) long, weighing 6,700 short tons (6,100 t).

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  • seattle's tunnel isn't the same as elon musk's boring plan

    seattle's tunnel isn't the same as elon musk's boring plan state department of transportation already has a giant boring machine, named bertha, only don't confuse her real work to musk's

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  • seattle tunnel machine 'bertha' reaches end of long

    · news > washington seattle tunnel machine 'bertha' reaches end of long, troubled journey. tue., . water pours from the base and a cloud of water vapor and concrete dust forms as a

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  • seattle's tunnel isn't the same as elon musk's boring plan

    seattle's tunnel isn't the same as elon musk's boring plan state department of transportation already has a giant boring machine, named bertha, only don't confuse her real work to musk's

    Get Price
  • tunnel machine set to dig under seattle, but it's not bertha

    a tunnel machine is set to resume digging beneath the streets of seattle in mid june. no, it's not bertha. it's brenda. bertha, the world's largest tunnel machine, has been stuck beneath the

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  • mammoet brings up tunnel boring machine bertha

    mammoet's heavy lifting engineers have lifted out the cutter drive unit (cdu) from tunnel boring machine 'bertha'. the unit was lifted to the surface, rotated to lie face

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  • the bertha crisis: how much will the delays cost seattle

    bertha's career was halted abruptly by the political conditions on the ground in seattle, a city with a history of being of two minds about vice.brbrwe haven't elected a woman mayor since, but naming the world's largest tunnel boring machine after her seemed appropriate. "bertha" is synonymous with "big," which the tunnel project is.

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  • tunnel boring machine, the free encyclopedia

    · a tunnel boring machine used to excavate the gotthard base tunnel, the world's longest rail tunnel a tunnel boring machine that was used at yucca mountain nuclear waste repository. a tunnel boring machine (tbm), also known as a "mole", is a machine used to excavate tunnels with a circular cross section through a variety of soil and rock strata.

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  • at least the tunnel isn't boring institute

    · there are plenty of words to describe the ongoing drama over seattle's not boring tunnel boring fiasco. ironic, for one, given that the 8 inch pipe that brought the world's largest tunneling machine to a halt was put in bertha's way by none other than the washington state department of transportation, as part of the early feasibility studies for the very tunnel they're now trying to build.

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  • mystery object blocking the giant tunnel boring machine

    "bertha," the massive tunnel boring machine, was expected to spend 14 months drilling a two mile tunnel to replace the 60 year old alaskan way viaduct. three delays have since hit the project that began in july. the tunnel will replace the viaduct, a double deck highway along the downtown seattle waterfront. (ap/ted s. warren)

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  • tunnelling epic ends as bertha breaks through in seattle

    legal problems were set aside yesterday when bertha, the world's second largest tunnel boring machine (tbm), finally broke into daylight in seattle to mark an historic milestone in the city's $3bn bid to revamp its downtown waterfront.

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  • seattle tunnel contractor will appeal $57m award to state

    · seattle (ap) — one of the two seattle tunnel prime contractors says it will appeal friday's jury verdict that rejected the companies' $330 million in claims against washington state over the breakdown of tunnel boring machine known as bertha.

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  • in seattle, a giant tunnel boring machine named bertha

    · after nearly four years, the giant tunnel boring machine known as bertha has finished its dig underneath the city. kate walters of here & now contributor kuow was there when bertha

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  • the end is near for bertha: after nearly 2 miles in 4

    bertha, the massive tunnel boring machine that drilled a nearly 2 mile tunnel to replace the 60 year old alaskan way viaduct, is shown in a photo taken with a fisheye wide angle lens in july 2013

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  • are tunnels for light rail really cost prohibitive

    maybe it was the gigantic tunnel boring machine that over ate itself with fine granulate until its boring head had to be rescued in a big open dig in the middle of seattle. may be it was the infamous big dig in boston with its perennial delays and cost overruns. or is it that almost any topic elicits antagonistic views split along party lines.

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  • seattle's 'bertha' boring machine halfway in tunnel

    "bertha has been steadily on the move and made her way to the second half of the tunnel," gov. jay inslee said in a statement. building a tunnel under seattle was the preferred choice to

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  • will elon musk really build a tunnel boring company? the

    the ascent is the motley fool's new personal finance brand devoted to helping you live a richer life. will elon musk really build a tunnel boring company? and if so, why? tunnel boring

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  • bertha stuck again: sinkhole prompts suspension of highway

    · the adventure of bertha the tunnel boring machine, already two years behind schedule, bertha stuck again: sinkhole prompts suspension of highway 99 tunnel project. the governor aired the worry shared by many citizens — that if seattle tunnel partners (stp) continues to dig too much soil as bertha proceeds north, the viaduct and

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  • in seattle, a giant tunnel boring machine named bertha

    · after nearly four years, the giant tunnel boring machine known as bertha has finished its dig underneath the city. kate walters of here & now contributor kuow was there when bertha

    Get Price
  • massive boring machine 'big becky' emerges from under

    · ontario's biggest – and most expensive – new hole in the ground has finally become a tunnel. big becky, the 4,000 tonne boring machine that has

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