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Table 3 - TBM Features

1 January 2000


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Main features of the TBM
Machine type Telescopic double-shield TBM (made by Mitsubishi)
Boring diameter 4.88m
Cutters 43cm (back-load type)
Number of disc cutters 32
Type of cutterhead drive Electric drive with variable speed (frequency variation)
Cutterhead speed 0-9 rev/min (electrical variable rotation speed)
Cutterhead drive power 6 x 250kW=1500kW
Boring stoke: main thrust 1300mm
Auxiliary thrust 2200mm
Mucking system Through belt conveyor
Machine weight (total) Approx. 450t
Total length of TBM (with back-up) 115m

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