The invention provides a continuous
box girder side span cast-in-place and closure section few-support overall supporting construction structure and method.The continuous
box girder side span cast-in-place and closure section few-support overall supporting construction structure comprises a steel
pipe support arranged on a transition
pier bearing platform, and the top of the steel
pipe support is provided with a shakeout unloading cylinder and a profile steel cross beam; the section steel cross beam is connected with the upper portion of the
cantilever casting section
hanging basket front cross beam through I-shaped steel to form an integral support. An existing
hanging basket front cross beam is used as a force bearing point, a foundation does not need to be additionally processed, a few single-row steel
pipe columns are arranged on a bearing platform, a
support system of a side span cast-in-place section can be formed, meanwhile, the side span cast-in-place section and a side span closure section can share a support for supporting, a side span closure section hanging bracket does not need to be independently designed, and the side span cast-in-place section and a final suspended pouring section can be synchronously constructed; the two-side wing plate full framing constructed in advance can shorten the follow-up side span closure section construction time. The problems of large foundation treatment and material investment of a conventional support method are solved, the contradiction of the construction sequence of a suspension
casting section and a side span cast-in-place section of a hanging bracket method is solved, and the method is suitable for side span cast-in-place and closure construction of continuous box girders of highways and railways.