| 摘要 |
PURPOSE:To safely perform repairing work for tunnel by a method in which a machine capable of running in tunnel, excavating cracked portions automatically, and mucking is provided. CONSTITUTION:A cutter head 23 capable of excavating portions to be repaired, a hose 30 to suck up muck with the head 23, and a pump 31 are provided in a machine with wheels 21 capable of running in tunnel. The machine is operated by a remote control to excavate cracked portions automatically. The construction work can thus be safely performed. |
