Self-walking type ultra-large pressure steel pipe assembling and welding integrated tackle and construction method thereof

The invention relates to the field of construction and installation of water and electricity pressure steel pipes, and discloses a self-walking type ultra-large pressure steel pipe installing and welding integrated tackle and a construction method thereof.The self-walking type ultra-large pressure steel pipe installing and welding integrated tackle comprises a first lifting trolley and a second lifting trolley, and a driving part is arranged at the top of the first lifting trolley and comprises a rotatable transverse rotating shaft; the tail end of the transverse rotating shaft is rotatably arranged at the top of the second lifting trolley; the transverse rotating shaft between the first lifting trolley and the second lifting trolley is further sleeved with a center body, a plurality of telescopic supporting rod sets arranged in the radial direction of the transverse rotating shaft are arranged outside the center body, and tile fixing parts are arranged at the tail ends of the telescopic supporting rod sets;