Tunnel excavation with NFM Technologies Double shield TBM (tunnel boring machines)

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Uploaded by on Sep 7, 2010

The double shield TBM (tunnel boring machines) allows faster tunnel excavation in hard rock formations as the segments are installed during excavation. The rotating cutterhead cuts the rock (front shield advance) and, simultanesously, the telescopic shield advances to lay the tunnel lining.

More informations : http://www.nfm-technologies.com/-Hard-rock-machines-.html#205

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Science & Technology

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