Tunnel Boring device: a method for the use thereof.

The machine (1) comprises a tubular frame (10), a drilling device (2) mounted on the front end of the frame, a tunnel wall forming device and a press device mounted close to the rear end of the frame for engaging with the formed tunnel wall. The tubular frame is tapered at a distance from its front end. Concrete and a concrete supply medium are delivered by injector devices (28) on the outside of the tapered part of the frame. A system is provided for delivering concrete mortar to the injector devices under pressure. An Independent claim is also included for a tunnel boring method using this machine.