Tunnel Boring Machines’ Disassembly
Our recent time-lapse video highlights the break-through and removal of the tunnel boring machines (TBMs) at the retrieval shaft and gives a closer look at how work advanced at that site.
The video shows TBM Mom Chung breaking into the water-filled retrieval shaft last June. The water is drained from the shaft for the arrival of TBM Big Alma. The departure of the machines comes next as workers remove both TBMs, piece by piece, over several months. The retrieval shaft site was restored and vacated in January 2015.
A metal cover was installed as the final step in restoring the site.
For more information about the project and construction progress, follow us on Facebook, Twitter, Flickr, YouTube and check out our project website.
nicely done, congratulations!