JACKING METHOD AND STRUCTURE FOR UPPER STRUCTURE OF BRIDGE

摘要

PURPOSE: A jacking method for an upper structure of a bridge is provided to prevent the fall, distortion and crack of a bridge when jacking the upper structure of a bridge. CONSTITUTION: The jacking method for an upper structure of a bridge comprises the steps of: interposing many hydraulic jacks(110¯130) on the lower part of a support beam(20) of a floor slab(10) and connecting hydraulic jacks(110¯130) and an oil pump(170) by a pipeline; installing a saddle bracket(200) coupled with a control rod(270) to the lower end of a support beam(20) of the floor slab(10) supported by the hydraulic jacks(110¯130); fixing a control rod guide bracket(300) to one side of a pier(30) to make the control rod(270) parallel to the side of the pier(30); fitting a control rod fixture(400) to the control rod(270) exposed to the lower end of the control rod guide bracket(300) and fixing the back end with a pin; and driving the oil pump(170) to make the compressed oil flow in through a pipeline, then lift up a support beam(20) of the floor slab(10).