| 摘要 |
PROBLEM TO BE SOLVED: To enable to assemble and disassemble a movable working device for a bridge safely and for a brief time without the need of huge equipment cost by using a limited working space under a bridge footing in an overhanging direction of the bridge.SOLUTION: An assembling step includes: a step of a first step installing a movable working vehicle 21 on a chapiter part 7 of the bridge footing 5; a second step of partially or entirely assembling a suspended floor structure 31 that is suspended by the movable working vehicle 21 in an upright posture along the bridge footing 5; and a third step of suspending the suspended floor structure 31 by a first suspended material 17 that is suspended from a fixed position on the chapiter part 7, and a second suspended material 23 that is suspended from the movable working vehicle 21. The third step includes a turning and suspending step where the upright suspended floor structure 31 is made to turn and assumes a lateral posture, and the suspended floor structure 31 is suspended to a predetermined position of a lower part of the chapiter part 7 by adjusting unreeling length of the first suspended material 17 and the second suspended material 23, and movement amount of the movable working vehicle 21. |
