CUTTING METHOD OF GROUND

PURPOSE:To make it possible to cut a tunnel in the required shape by fitting and loading a cutting shaped templet having a guide channel for wire-saw traveling devices to structural boards provided to both sides of the tunnel, and traveling the wire-saw constructed between the structural boards along the guide channel. CONSTITUTION:A cutting shaped templet 3 having a guide channel 2 to make it possible to move wire-saw traveling devices 1 is formed, the structural boards 5 having guide sections 4 are erected to both sides of a tunnel scheduled to excavate. After that, the cutting shaped templet 3 is fitted and loaded to the structural boards 5, the wire-saw traveling devices 1 are fitted and loaded thereto, and a cutting wire 6a is constructed between pulleys 1a and 1a so that it is capable of reciprocation. Then, the cutting shaped templet 3 is pushed up to the upper ends of the structural boards 5, a motor 8 is driven to travel the cutting wire 6a, and it is cut while moving it from above of the ground 7. The traveling devices 1 and 1 are moved along the guide channel 2 to cut the tunnel in the required shape.