METHOD FOR FABRICATING BOX-SHAPED BRIDGE CHORD

A method for fabricating a box-shaped bridge chord, comprising: a box girder wall plate (2) firstly abuts against thick and thin plates on a horizontal tire frame, a central line of a gusset plate, a butt plate and the joint center line of a connecting web are pre-marked and positioned, and a stiffener rib (23) and a stiffener plate (24) are assembled and welded to the box girder wall plate (2); mounting a transverse stiffening partition (25) in the interior of a box body; mounting another box girder wall plate (2); hoisting a top plate (3), the top plate (3) being pre-assembled and pre-welded to the stiffener rib (23), and a deep penetration weld being present between the stiffener rib (23) and the top plate (3); hoisting in sequence outer side transverse partitions (13) of an outer side box body of the box girder wall plate (2) onto the tire frame; hoisting units of a bottom plate (1) onto the tire frame for assembly and positioning; and then mounting and welding a first support seat (5) and a group of seco