I chatted with the crane operator: he says this hole is going to be 80' deep, and the drill itself is 200' long. It's currently being disassembled in New York, and will be traveling here by boat, arriving some time in March.
SOMA Nature Walk
Tags: firstperson, photography, robots, sf
Location: 37° 46' 46.80" N, 122° 23' 54.00" W
9 Responses:
So...what's going into the hole?
The drill, as jwz calls it, a tunnel boring machine.
I'm a bit disappointed it's not traveling from NY to SF by tunnel. Way to fail to construct the burrito tunnel, guys.
But the burrito tunnel goes in the other direction!
I was under the impression that a burritos-for-bagels exchange would have made the whole project self-funding.
The tunnel is direction agnostic, it's the burritos that travel west to east. Some one man, this is simple burrito-chromo-dynamics!
That's why they were doing slurry wall construction 3 weeks ago. The slurry-built walls are strong enough to prevent the shaft from collapsing as they dig it. Next, when the TBM arrives and the shaft is complete, they lower the pieces of the TBM into the hole and reassemble it at the bottom. And then the boring begins.
Ziggy says you have to work the shaft, Sam! Work the shaft!!!
cfs
More like tunnel exciting machine! Amirite?
If you want to see the last project your new drill completed, check out http://thelaunchbox.blogspot.com/ - it was used to tunnel the Second Avenue Subway.