This is the 2nd half of the the image set that
was posted on The Launch Box last weekend.
The 1st half of this set can be found on this link:
"A View Down Below - January 23, 2011"
All of the images shown below were taken on January 18, 2011.
Note that you can left-click on any image
to view it in high-definition format.
A rather dramatic image of a group of Sandhogs working in the very confined space near the head of the tunnel boring machine (TBM).
In this image, you can see the rear support legs of the TBM in the foreground on the right and the left.
Courtesy of The Robbins Company
This diagram, which was also shown in the original posting, details the major components of the Main Beam TBM that is being used to bore the two tunnels for Phase I of the Second Avenue subway.
A short video showing how a TBM of this type works can be found on this YouTube link: Robbins Main Beam TBM Boring Cycle.
In this image, you can see one of the gripper shoes of the TBM.
The equipment shown
A note - somehow the rest of the posting is now missing. When I have some time I will attempt to recreate it.