Large-span inverted siphon slope section pressure steel pipe construction method

The invention relates to the technical field of water conservancy projects, and particularly discloses a large-span inverted siphon slope section pressure steel pipe construction method which comprises the following steps: S1, construction preparation; s2, initial mounting section hoisting; s3, installing a winch; s4, pipe joints are installed; s5, mounting a pressure steel pipe support hanger; s6, the initial installation section is installed; s7, other pipe sections are installed; and S8, dismounting the temporary tool fixture, and repairing the defects of the pipe wall. When the pressure steel pipe is constructed on the slope section, the height and the axis of the pipe joint can be accurately adjusted, the installation deviation is reduced, the assembling accuracy and firmness of each section of the steel pipe are ensured, the problem that in the pressure steel pipe assembling process, the center line and inclination errors are large, and consequently the construction efficiency is poor is solved, and the