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Rear of tunnel boring machine with completed tunnel walls behind it in 2017. On December 22, 2015 at 12:30 a.m., the machine resumed digging 1.5 feet (0.46 m) through sand poured into the recovery pit. By January 4, Bertha had traveled 1,098 feet (335 m) of its planned 9,270-foot-long (2,830 m) route from SoDo to South Lake Union. [5]
The current plan emerged in 2009 when government officials agreed to a deep-bore tunnel. Construction began in July 2013 using "Bertha", at the time the world's largest-diameter tunnel boring machine. After several delays, tunnel boring was completed in April 2017, and the tunnel opened to traffic on February 4, 2019.
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 ]
Bertha (tunnel boring machine) M. Martina (tunnel boring machine) T. Tuen Mun–Chek Lap Kok TBM This page was last edited on 19 December 2019, at 02:34 (UTC). Text ...
The Tuen Mun - Chek Lap Kok TBM otherwise known as Qin Liangyu or more formally, the Mixshield S-880 was the world's largest tunnel boring machine launched in June 2015 by Herrenknecht in Germany. [1] [2] The TBM was used to drill a 5 km tunnel connecting Tuen Mun to the Hong Kong International Airport, part of the Tuen Mun–Chek Lap Kok Link ...
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
During the construction of the State Route 99 tunnel, the Bertha tunnel boring machine became stuck in rocks near Ballast Island, triggering significant archaeological interest in the former island, alongside concerns that the tunnel boring may have inadvertently disturbed the remains of the site.
The tunnel was constructed using Bertha, the world's largest tunnel boring machine at the time of its launch in 2013, which had a two-year halt and completed its bore in 2017. The viaduct was demolished in 2019, leaving room for an expanded park promenade on Alaskan Way that is planned to be completed in 2024.