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New boring machine for Metro Green Line tunnel

DUBAI — The Roads and Transport Authority (RTA) announced that the third Tunnel Boring Machine (TBM3) Al Wugeisha 3 is scheduled to arrive in Dubai today. The TBM will run from Al Ras to BurJuman for the Green Line which is the second phase of the Metro project.

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By A Staff Reporter

Published: Thu 13 Sep 2007, 8:52 AM

Last updated: Sun 5 Apr 2015, 5:10 AM

A TBM is used to excavate tunnels in a circular cross section through a variety of geologies. It is manufactured to bore through hard rocks or sand layers and almost anything in between.

Engineer Adnan Al Hammadi, Director of Construction Department, Rail Agency, RTA said, “The Earth Pressure Balance (EPB) type TBM designed and assembled for Dubai Metro has a diametre of 9.56 metres, is 82 metres long and weighs 1,000T. The Cutter head will have a revolution speed of 0.1-1.82 rev/min.

“The boring for the project is scheduled to commence in December at Al Ras towards BurJuman for the Green Line. The tunnelling will pass under the creek up to a length of 2.5km and at a maximum depth of 30 metres,” he added.

A Staff Reporter

Published: Thu 13 Sep 2007, 8:52 AM

Last updated: Sun 5 Apr 2015, 5:10 AM

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