the bertha tunnel boring

the bertha tunnel boring

Bertha (tunnel boring machine) - Wikipedia

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. An abbreviated history of Bertha:

Alaskan Way Viaduct - Follow Bertha

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.

Tunnel boring machine - Wikipedia

4/4/2017 · 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.

Bertha- Raising tunnel boring machine Bertha from below ...

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 the last few feet of a ...

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

“Bertha,” as it’s known, is the world’s largest TBM and will spend the next 14 months boring a 1.7 mile (2.7 km) tunnel under the city as part of a US$3.1 billion project to replace a ...

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

Currently, Bertha is the largest diameter tunnel boring machine in the world, though a slightly larger one (by about a quarter foot) was used last year in China for a short section of tunnel ...

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About KAMY

KAMY series of Roadheaders offers the best cutting performance in a wide range of rock formations. Equipped with geometrically optimized transverse or longitudinal cutter heads, these flexible machines can be used to excavate subway tunnels, road tunnels, railway tunnels and water tunnels without using explosives.