February 4th 2010
The tunnel is 5,757.2 meters long at an elevation below the surface of 89 meters.
There is no tunnel over-break. TBM averaging 18.5 meters per day
The Concrete Invert Bridge is at 3,850 meters
The Restoration Carrier: Grinding is at 1,040 meters
Shotcrete is at 800 meters
Have you ever noticed that nobody else is reporting on this? How can that be? Are they so sick of the toyota-like cover-ups, that they just flee from this? Can everybody sense that they are hiding things?
Anyway the main TBM has it's accelerator stuck and is zooming away full speed. But what else is on the critical path? Yes, the bizarre Restoration Carrier contraption! I believe this concept is new to the tunneling world, and they are going quite slowly. They have been stuck at around 7-800 m for some time now.
And now they have added something new - 'grinding'. What is that? They are grinding away the existing shotcrete? To make the new stuff stick better?
I have a vision of them at this contraption, staring ahead at the major overbreak, and scratching their heads. The previous rock-fall showed a dangerous tendency to 'unzip', much like a fault unzips for an earthquake. Are they actually thinking that this is certain death? Will they take the plunge into unknown waters? I shall wait for the next report.