Corrugated steel web box girder bridge hydraulic type supporting system

The invention discloses a corrugated steel web box girder bridge hydraulic type supporting system, which comprises a cylinder body and at least two telescopic devices, wherein the cylinder body is provided with a first oil cavity; the two telescopic devices are fixedly connected with the cylinder body and are arranged in a bilateral symmetry mode; each telescopic device comprises two telescopic mechanisms, and the two telescopic mechanisms are distributed in a V shape with an outward opening; each telescopic mechanism comprises a telescopic barrel, a piston rod and an oil supply device; the inner end of each telescopic barrel is fixedly connected with the cylinder body, a telescopic cavity is formed in each telescopic barrel, and the inner end of each telescopic cavity is communicated withthe first oil cavity; the inner end of the piston rod is mounted in the telescopic cavity in a sliding manner through a piston; and the oil supply device is used for supplying hydraulic oil to the first oil cavity. The suppo