Method and apparatus for drilling a tunnel

Details Method and apparatus for drilling a tunnel Method and apparatus for drilling a tunnel

E - Fixed Constructions

21

D

E21D 9/00 (2006.01) E21B 7/20 (2006.01) E21B 19/086 (2006.01)

Patent

CA 2066238

2066238 9105137 PCTABS00004 The invention relates to a tunnel drilling method by means of which a protecting (1) tube, which is to be installed in the tunnel, and a tunnel drilling tool are driven forward by one and the same power unit in the tunnel working pit so that the driving power of the unit is divided into a force driving the protecting tube and, over a rotating unit (3), into a force driving the drilling tool and that distribution of said force to the rotating unit is effected by a power transmitting thrust bearing (50).

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