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the bertha tunnel boring

  • Follow Bertha's breakthrough - The WSDOT Blog

    Below is footage of Bertha's breakthrough, ... Labels: Alaskan Way Viaduct, Bertha, Bertha breakthrough, SR 99 tunnel, tunnel boring machine. 38 comments:

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  • SR 99 (@BerthaDigsSR99) | Twitter

    @BerthaDigsSR99. Bertha completed her dig and now we're completing the work to replace ... It's been one year since Bertha broke through at the tunnel's north ...

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  • Bertha breaks into repair vault | The Today File | Seattle Times

    Update 4:15 p.m.: Tunnel-boring machine Bertha's cutterhead is within about three feet of drilling all the way to open air, which ought to happen this evening.

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

    Apr 03, 2017 · Bertha has broken through. After nearly four years underground, Seattle's beleaguered boring behemoth clawed its way into daylight yesterday, leaving a 1.7-mile tunnel behind it. And now that its job is done, workers can at last move an aging, potentially dangerous stretch of elevated highway ...

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  • Reanimating Bertha, a Mechanical Behemoth Slumbering Under ...

    Aug 01, 2014 · The world's biggest tunnel-boring machine, nicknamed Bertha, is awaiting repairs, and getting it going again will be an engineering feat in itself.

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

    The World's Largest Tunnel-Boring Machine Must Be Saved. Bertha has stalled deep beneath Seattle, leaving the city's planned waterfront renaissance hanging in the balance.

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  • Bertha breaks through: World's largest boring machine ...

    The normally sedate city of Seattle sounded more like the set of a science fiction epic today as the world's largest boring machine roared and screeched its way into the open air. The tunnel boring machine, better known as "Bertha" cut through a wall of reinforced concrete in the shadow of the city ...

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  • Bertha (tunnel boring machine) - Wikipedia

    Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and is the world's largest earth pressure balance tunnel boring machine, at a cutterhead diameter of 57.5 feet (17.5 m) across.

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  • Seattle tunnel machine begins drilling after 2-year break ...

    Jan 06, 2016 · SEATTLE – Seattle's tunnel-boring machine has moved past the concrete walls that make up a repair pit and has started digging into soil about 80 feet below street-level along the city's waterfront. After being out of commission for about two years, the machine called Bertha has tunneled about 73 ...

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  • Bertha Finally Breaks Through In Seattle : The Two-Way : NPR

    Apr 03, 2017 · Bertha Finally Breaks Through In Seattle : The Two-Way After a two-year delay for repairs, the giant tunnel-boring machine has completed its mission far beneath the city's streets.

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  • Watch Bertha, the world's largest tunnel boring machine ...

    From the dark depths beneath Seattle, Bertha the SR 99 tunnel machine headed out of the muck and into daylight on Tuesday, completing a final push in a years-long effort to create space for a new highway beneath the city.

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  • Boring Bertha: State Doubts New Dates For Tunnel Opening ...

    Bertha, the giant tunnel boring machine stalled in downtown Seattle, remains in pieces at the foot of the Alaskan Way Viaduct.

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  • The Bertha Tunnel Boring - Image Results

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  • Pictured: The world's most powerful tunnel-boring machine ...

    Crews struggled for weeks to reach the object that was blocking the boring machine, ... Work has continued on the tunnel, despite Bertha grinding to a halt, ...

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  • Seattle tunnel machine Bertha under tight schedule during ...

    Update: Bertha has already begun boring forward toward the Alaskan Way Viaduct. Crews fired up the boring machine at 9 a.m. Friday morning. Read more. Despite the rough start to the Seattle tunnel project, Deputy Project Administrator David Sowers expects better things for the next phase of work ...

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  • Under Seattle, a Big Object Blocks Bertha. What Is It? - The ...

    Dec 19, 2013 · In October, workers walked through the first rings of the highway tunnel being built under Seattle's waterfront toward the boring machine called Bertha.

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  • Bertha, The Giant Tunnel-Boring Machine Stuck Under Seattle ...

    The world's largest tunnel-boring machine, nicknamed Bertha, has been stuck beneath Seattle for over a year amid its efforts to build a pathway for an underground highway to replace one that is currently obstructing the city's waterfront.

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  • Bertha breaks through: Tunnel boring machine completes 4-year ...

    The world's largest tunnel boring machine, dubbed Bertha, finished its $2.1 billion, four-year journey drilling a 1.75-mile path under Seattle when it broke through to daylight on Tuesday, according to The Seattle Times. The remainder of the nearly $3.2 billion Alaskan Way Viaduct replacement ...

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  • Seattle's tunnel boring machine Bertha reaches end of long ...

    Apr 03, 2017 · With a cloud of dust, Bertha — Seattle's tunnel boring machine — reached the end of her long, troubled journey, a milestone in a multibillion-dollar project to replace an aging highway hugging the city's waterfront.

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  • Seattle tunnel, among world's biggest, takes step toward ...

    Apr 03, 2017 · Bertha, one of the world's largest tunnel boring machines, emerged north of downtown Seattle on Tuesday.

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  • The Bertha Tunnel Boring - News

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  • Alaskan Way Viaduct - Follow Bertha

    Follow Bertha Thank you for following Bertha. The SR 99 tunneling machine, nicknamed Bertha, has completed her work. For the latest tunnel progress, visit our new tracker page.

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  • Follow Bertha's breakthrough - The WSDOT Blog

    Below is footage of Bertha's breakthrough, ... Labels: Alaskan Way Viaduct, Bertha, Bertha breakthrough, SR 99 tunnel, tunnel boring machine. 38 comments:

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  • Tunnel Boring Machine Animation - YouTube

    Jan 15, 2013 · This animation shows an example of what a tunnel boring machine looks like and how it works.

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  • Alaskan Way Viaduct - Tunneling

    The tunneling machine known as Bertha began tunneling beneath Seattle in July 2013 (photo at right: ... + Bertha's tunnel route

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