WIRE-SAW EXCAVATION APPARATUS AND TUNNEL EXCAVATION METHOD USING THE SAME

A wire-saw excavation apparatus comprising a plurality of entry arms (10) with pulleys (12) installed in each direction at an end and with a wire-saw (W) wired through the pulleys, a support frame (20), and a driving unit/roller (30). A tunnel excavation method, using the wire-saw excavation apparatus, includes the steps of (a) drilling a plurality of entry holes (51-54) on the target surface (1) of the rock along a cutting section (C), (b) inserting into the entry holes the entry arms with the wire- saw wired through the pulleys to correspond with multi-directional cutting lines (L) of the cutting section, (c) installing a support frame comprising a matrix structure having at least a first frame (21) placed in direction 1 and at least a second frame (22) placed at direction 2 to correspond with the cutting section, and a having plurality of insertion holes (23) to insert the entry arms therein, and (d) operating the driving roller to cause the wire-saw to cut the rock at the cutting section.