A withdrawing steel wire and clear hole device subassembly for changing old jib of jib arched bridge

The utility model provides a withdrawing steel wire and clear hole device subassembly for changing old jib of jib arched bridge, is including work steel strand wires, stretch -draw jack, last connector, connecting rod, lower connector and the upper and lower spike connected in order, under the operating condition: down the connector lower extreme is connected and is treated the withdrawing steel wire, and the upper end is connected the connecting rod in proper order respectively, is gone up the connector, the work steel strand wires, goes up the connector upper end and adopts clamping piece anchor mode connection work steel strand wires, goes up the connector lower extreme and adopts the screw thread mode to connect the connecting rod, the connector lower extreme adopts pier nose anchor mode to connect the withdrawing steel wire of waiting to trade the pole down, and lower connector upper end adopts the screw thread mode to connect the connecting rod, down the spike is installed on the bridge floor, goes up the spike and installs on spike down single withdrawing of drive stretch -draw jack stretch -draw work steel strand wires realization as the counter -force support frame of stretch -draw jack. Using the the device subassembly to carry out the old jib of arched bridge and demolising, manual work intensity is little, and the work efficiency is high, and safe and reliable neither destroys the standard mechanized construction of being convenient for again of bridge primary structure.