Friday, December 18, 2009

Did You Know? Way Cool Stats about the TBM

Okay, I admit that these stats are way cool, even for non-engineers.

The tunnel boring machine (TBM) in use to create the New Crystal Springs Bypass Tunnel has 23 disc cutters in the cutterhead and they are each 17 inches in diameter.

It has a torque of 593,920 foot-lbs and an operating thrust of 1,150,000 lbs operating.

It has 5 gantry cars in its trailing gear, 2 muck conveyors and the total length of the shield and trailing gear is 155 feet.

Here is a photo showing part of its 155 foot long length during assembly in September.

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