This is an interesting video of crews changing cutterhead teeth on the Bertha TBM beneath downtown Seattle. [Source: WSDOT YouTube Channel. Image: YouTube]
Video: Changing cutting tools on Bertha TBM
Miscellaneous
Happy National Tunneling Day (UK)
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 […]
Project Related
Tunnel for Las Vegas Convention Center Nearly Half Done
The Boring Company’s tunnel boring machine is nearly complete with the first half of the dual tunnel people mover system servicing the Las Vegas Convention Center. The secretive tunnel project is reported to cost $52.5M […]
Project Related
The Building Blocks of the SR 99 Tunnel
The tunnel liner that is being placed by the Bertha tunnel boring machine consists of precast concrete segments. This video by the WSDOT shows how they are made at the casting yard, and what Bertha […]