Automated TBM tracking improves productivity, saves cost

02/20/2013 | Engineering News-Record

The Virtual Laser Target Board, an automated tunnel-boring machine tracker, is being used to help dig a $14 million, 8-foot-diameter sewer tunnel in Edmonton, Alberta. It is a "geomatics-based survey guidance system" that can reduce the duration and cost of the project. It also minimizes "interruptions in surveying while delivering real-time as-builts of the tunnel's interior," according to this article. "With the new system, we get readings in moments, and it only takes about 30 minutes to move the device down the tunnel and set it up again," said engineering manager Siri Fernando.

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