The invention discloses a construction method for ground cable hanging and aerial
butt joint of an ultra-large-span prestressed
pipe truss. The construction method is characterized in that the ultra-large-span prestressed
pipe truss is divided into three sections A, B and C according to the characteristics of the ultra-large-span prestressed
pipe truss structure, each section is assembled on the ground through a jig frame, and after the procedures of jig separation, transportation, overturning, hoisting and the like, the sections A and C are hoisted to a designed position at first; the sectionB is divided into a subsection B1 and a subjection B2 and spliced on the ground through a jig frame, after jig separation, the subsections B1 and B2 are sequentially hoisted to a
ground support framefor aerial
butt joint, a prestressed steel inhaul cable is hung, and the steel inhaul cable is primary tensioned according to a
simulation checking result; and after primary tensioning, the section Bis hoisted to the designed position through two machines to be in aerial
butt joint with the section A and the section C, after butt joint is finished, a connecting truss is installed, the steel inhaul cable is finally tensioned according to the
simulation checking result, and the ultra-large-span prestressed pipe truss is installed. The construction method highlights the characteristics of highconstruction speed, low cost, low
safety risk, high construction quality and the like in the operation process.