Beyond vertical conveyors as part of package systems,


the company has supplied in-tunnel and stacker conveyors for many projects – such as the in-tunnel conveyors that traveled behind its Crossover TBM on the Kargi hydro project, in Turkey; and, the stacker conveyor for depositing spoil at the AMR water tunnels, in India. On OFTA, Robbins has supplied the system on a


number of tunneling projects, such as on the Black River Tunnel in Lorain, Ohio. The OFTA system takes place by assembling major


components in a concrete cradle. The system has been successfully used to save months on project schedules, and also benefits projects by reducing shipping costs and man-hours compared to the option of shop- assembled machines, says Robbins.


Top:


OFTA assembles the major components of a TBM in a concrete cradle


Centre:


OFTA save time, and reduce shipping costs and man-hours compared to shop-assembled machines


Left:


A cutterhead at the Black River Tunnel in Lorain, Ohio, USA being lowered into the launch shaft after Onsite First Time Assembly


Fall 2023


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