Seattle Tunnel Partners has released a conceptual plan showing what the excavation of the pit will look like to repair the damaged Bertha Tunnel Boring Machine. See below.
A pit 120 feet deep and 83 feet in diameter will be excavated so that the TBM can be driven into the pit and the cutterhead removed. Crews will then repair the seal system around the main bearing. [Source: WSDOT, Image Credit: Seattle Tunnel Partners and Brierly Associates by way of WSDOT]
The troubled Alaska Way Viaduct Replacement Tunnel TBM known as Bertha has reached a milestone in its repair. The front cutterhead has been repaired, and has been lowered back into the access shaft to be […]
The British Tunnelling Society (BTS) is encouraging our profession and the public to celebrate National Tunneling Day today, December 7. Their goal is to promote the industry (and its many professions) to students of all ages […]
Seattle Tunnel Partners and WSDOT are moving forward with the plans to excavate a 120 foot deep shaft to repair the Bertha Tunnel Boring Machine. Unfortunately, there are archaeological issues since the project team did […]
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