Construction method of railway steel pylon crossing multi-track operation line

The invention belongs to the technical field of bridge engineering construction, and particularly relates to a construction method of a railway steel pylon crossing a multi-track operation line. The method comprises the following steps: S100, support erecting: firstly, installing a construction foundation according to design requirements, and after foundation construction is completed, erecting a plurality of steel pylon assembly supports on the foundation; S200, horizontal rotation structure installation: embedding a bearing platform steel box into a lower bearing platform, sequentially installing a horizontal rotation spherical hinge and a pylon bottom section on the bearing platform steel box, arranging a vertical rotation spherical hinge on the upper portion of the pylon bottom section, and arranging a rotary disc steel box on the periphery of the pylon bottom section; S300, pylon horizontal splicing: sequentially splicing pylons by taking the pylon bottom section as a starting point, and welding and conn