| 摘要 |
PURPOSE:To improve working efficiency of disassemblying a bridge floor plate by cutting a floor board into a plural number of blocks, drilling lifting holes in the blocks, laying a removal girder across the reaction leg portion positioned on adjacent blocks on both sides and lifting up the blocks upon connecting the removal girder and the blocks together through the lifting holes. CONSTITUTION:A concrete floor plate 1 required to be disassembled is cut into a plural number of blocks 3. Lifting holes 4 is then drilled in the blocks 3. A reaction leg portion 7 provided with a reaction jack 8 is positioned on blocks 32, 32 adjacent to the block 31, which is to be freed from anchored to a bridge girder 5, and a removal girder 6 is laid across the leg portions 7 so as to make a vertical move by virtue of the action of a piston 81 of the reaction jack 8. The removal girder 6 and the block 31 are connected together by means of inserting lifting bolts 9 through a through hole 62 drilled in the removal girder 6 and lifting holes 4 on the block 31 and secured with nuts 10. The reaction jack 8 is then actuated to elevate the piston 81. When the removal girder 6 is pushed upward, the block 31 is pulled by the lifting bolts 9 causing the bridge girder 5 to be separated from the block 31. |
