Welding method for curve variable-beam-width continuous steel box beam structure

The invention provides a welding method for a curve variable-beam-width continuous steel box beam structure. The welding method comprises the following steps that S1, a top plate unit piece, a bottom plate unit piece, a partition plate unit piece and a web unit piece are prefabricated, assembled and welded; s2, surveying and setting out, and erecting a ground tire; s3, the bottom plate unit piece, the partition plate unit piece, the web plate unit piece and the top plate unit piece are sequentially installed on the ground tire to form a steel beam box body; and S4, disassembly and tire unloading are conducted, and the line shape of the steel beam box body is checked and corrected. According to the welding method for the curve variable-beam-width continuous steel box beam structure, the positioning precision and the straightness of the longitudinal ribs of the curve variable-beam-width continuous steel box beam are guaranteed, welding deformation is small, the final assembly efficiency and the product quality