| 摘要 |
PROBLEM TO BE SOLVED: To provide a cutting device capable of easily and safely removing an existing structure by reducing labor and by shortening a construction period.SOLUTION: A cutting device is provided in a hollow existing structure 3 composed of reinforced concrete, and cuts the existing structure 3, and includes a base 2, a cutting edge assembly 6 having a cutting edge member 5 having an edge part 4, cutting edge driving means 7a and 7b for advancing and retreating the cutting edge assembly 6, a pair of arm part support bodies 9a and 9b movable in the overhang direction B1 and the pull-in direction B2 for separating to the side from the base 2, a reaction receiving support body 11 having a reaction receiving surface 10 capable of contacting with an inner surface 3a of the existing structure 3 and arm part driving means 60 for moving the respective arm part support bodies 9a and 9b in the overhang direction B1 and the pull-in direction B2.SELECTED DRAWING: Figure 1 |
