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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.
Tunnel boring machine $2.1 billion megaproject [14] 2019– King County Ship Canal Water Quality Project 21.67 ft (6.61 m) and 8 ft (2.4 m) 2.7 mi (4.3 km) Largest tunnel boring machine named "Mudhoney" to construct combined sewer outflow storage tunnel under EPA consent decree. Two smaller machines for conveyance tunnels. [15] [16]
The State Route 99 tunnel, also known as the Alaskan Way Viaduct replacement tunnel, is a bored highway tunnel in the city of Seattle, Washington, United States.The 2-mile (3.2 km), double-decker tunnel carries a section of State Route 99 (SR 99) under Downtown Seattle from SoDo in the south to South Lake Union in the north.
Bertha, one of the world’s largest tunnel boring machines, emerged north of downtown Seattle on Tuesday.
Seattle Public Utilities held a public naming contest for its latest massive piece of machinery — a tunnel boring machine that will be used to build a storage space for the Ship Canal Water ...
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 ...
The University Link tunnel is a 3.15-mile (5.07 km) [2] [3] light rail tunnel in Seattle, Washington, United States. The twin-bore tunnel carries Link light rail service on the 1 Line from the Downtown Seattle Transit Tunnel to University of Washington station via Capitol Hill station .
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".