DEVICE AT TUNNEL BORING MACHINE ARRANGED FOR DRILLING OPERATIONS WITHOUT OPERATORS IN THE BOREHOLE
A tunnel-boring machine (3) comprising a frame (6), a rotating boring head (4) with rolling disc cutters (5) supported at a front end of a first frame portion (6a), a second, polygonal frame portion (6b) extending rearwards from the first frame portion (6a), and a longitudinal axis (33), in which an anchoring unit (7) provided with several radially displaceable anchoring feet (1 1) is arranged in a rotationally rigid manner on the second frame portion (6b), displaceable in the longitudinal direction of the tunnel-boring machine (3) by means of at least one hydraulic feeding cylinder (10), a transport device (20) arranged to move the tunnel-boring machine (3) in a borehole (2) is connected to the frame (6), and the transport device (20) comprises several wheel sets (21 a), each wheel set (21 a) including at least one wheel (21) which is connected to a driving motor (27), and the wheel sets (21 a) being supported in bogies (23) which are pivotably connected to telescopic structures (24) which are radially displaceable by means of hydraulic cylinders (25).