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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.
Beck tunnel boring machine; Bertha (tunnel boring machine) M. Martina (tunnel boring machine) T. Tuen Mun–Chek Lap Kok TBM
A tunnel boring machine (TBM), also known as a "mole" or a "worm", is a machine used to excavate tunnels. Tunnels are excavated through hard rock, wet or dry soil, or sand, each of which requires specialized technology. Tunnel boring machines are an alternative to drilling and blasting (D&B) methods and "hand mining".
Bertha arrived in Seattle on April 2, 2013, and its 40 pieces were assembled in the launch pit before tunnel boring began on July 30—setting a record for the world's largest tunnel boring machine. [197] [198] Tunnel boring was halted at 1,028 feet (313 m) near South Main Street in December 2013 after the machine encountered an unknown object ...
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Boring machine may refer to: Boring machine (carpentry) A machine for boring (manufacturing) holes; Tunnel boring machine; A machine that is not very exciting. See also
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) ...
Big Bertha (lunar sample), the third largest lunar rock collected by the Apollo program during Apollo 14; Bertha Heyman, a.k.a. "Big Bertha", a 19th-century criminal; Big Bertha (cow), a cow that broke two Guinness World Records, for being both the oldest and having the most offspring; Big Bertha (golf club), a line of golf clubs from Callaway Golf