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- Double-shield tunnel boring machine
Double-shield tunnel boring machines
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Diameter: 2.8 m - 12.5 m
Double Shield TBMs are among the most technically sophisticated tunnel boring machines. They unify the functional principles of Gripper and Single Shield ...
Diameter: 1.6 m - 15 m
... first Double Shield TBM for a customer who anticipated tunneling through large sections of fractured rock. In recent years, several Robbins Double Shield TBMs have broken ...
The Robbins Company
Diameter: 54 in - 78 in
... both Single Shield (SBU-RHSS) and Double Shield (SBU-RHDS) models. Rockheads employ a different excavation method from the Robbins SBU-A, which is dependent on the auger for torque ...
The Robbins Company
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