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Freighter Fairpartner carrying the disassembled tunnel boring machine into the Port of Seattle in April 2013. Bertha was designed and manufactured by Hitachi Zosen Sakai Works of Osaka, Japan, and was the world's largest earth pressure balance tunnel boring machine, [14] at a cutterhead diameter of 57.5 feet (17.5 m) across.
The $80 million tunnel boring machine (TBM) Bertha was created for this project by Hitachi Zosen Corporation near Osaka, Japan. The 326 ft (99 m), 6,700-short-ton (6,100 t) TBM was disassembled into 40 pieces and shipped to Seattle, where it was reassembled in the launch pit near the south end of the future tunnel. [63]
A tunnel boring machine used to excavate the Gotthard Base Tunnel, Switzerland, the world's longest rail tunnel An earth pressure balance TBM known as Bertha with a bore diameter of 17.45 meters (57.3 ft) was produced by Hitachi Zosen Corporation in 2013. [ 40 ]
A deep-bored tunnel was selected in 2009 and the southern section of the viaduct was demolished in 2011 and replaced with a six-lane, single-deck freeway that travels through the SoDo industrial area. [5] Excavation of the downtown bored tunnel by the tunnel boring machine "Bertha" began in 2013 and was completed in 2017 after two years of ...
The backside of Bertha the tunnel boring machine and the unfinished interior of the SR 99 tunnel, seen in January 2017. After the demolition of the viaduct's southernmost stretch and its lanes were realigned onto an adjacent bypass in 2012, crews began excavation of a 420-foot-long (130 m) launch pit to house the tunnel boring machine. [195]
The employee told Merideth in the email that, just recently, six of 12 passive articulation cylinders—the parts of the machine that would help Boring’s tunneling machine turn as it digs ...
This is a list of the world's largest machines, both static and movable in history. ... Big Bertha: Tunnel boring machine: 99 m (324 ft 10 in) [8] 17.5 m (57 ft 5 in) ...
The employee told Merideth in the email that, just recently, six of 12 passive articulation cylinders—the parts of the machine that would help Boring’s tunneling machine turn as it digs ...