| 摘要 |
PURPOSE:To prevent noise and vibration accompanying the crushing of pavement slab by a method in which the paved road around a manhole is cut into a circular form, and the manhole and the pavement slab adhered to the manhole are removed out together. CONSTITUTION:Tips of both legs of an inversed V-shaped part 4 are coupled with hooks provided to the manhole cover 2 on the paved road 1, the screw shaft 5 is clamped with the cnetral part of the manhole cover 2 from the crossing portions of the both legs, and the part 4 is fixed to the cover 2. A rotary arm 6 is rotatably attached to the screw shaft 5, and the base 8 of a road cutter vehicle 7 is connected to the other end of the arm 6. When the road cutter vehicle 7 is run, a circular cutting 24 is performed by a disc blade 11, and after the cutting, the manhole and pavement slab adhered to the manhole are integrally removed out, and new manhole is set and fixed. |
