The invention discloses an installation mobile support for a bridge floor
flange bottom surface
pipe of an in-service bridge and an operation method, and relates to the field of bridge construction. The structure of the support comprises a travelling crane, a beam, a vertical truss, a working platform, a hoist, a balancing weight and the like, the mobile support is arranged at two ends according to the length of a
pipe which needs to be installed in a segment division mode respectively, and the two mobile supports move or are fixed along a track which is laid on the bridge floor
flange top surface in the vertical direction so that the
pipe can be lifted and fixedly arranged on the bridge floor
flange bottom segment by segment, and the interval between two travelling cranes can be flexibly set according to the
segment length of the pipe to be installed; meanwhile, the travelling crane of each mobile support is bound on the bottom of a
handrail through a steel
wire rope, the support can facilitate temporary fixing of the travelling crane and effectively prevent horizontal movement of the travelling crane along a bridge floor flange, and the improved installation mobile support for the bridge floor flange bottom surface pipe of the in-service bridge and the operation method have the advantages that the support is simple in structure, remarkable in working efficiency, low in cost, safe and reliable, and wide in application range, and can be more widely applied and popularized.