Urban viaduct prestressed steel beam arrangement structure

The utility model discloses an urban viaduct prestressed steel beam arrangement structure, including bridge upper portion subassembly, bridge lower part subassembly and strand subassembly, bridge upper portion subassembly includes concrete box beam, box girder web, case back board, edge of a wing cantilever, box girder baseplate and case room, concrete box beam's inside has been seted up the caseroom, case number of chambers volume is two, and the symmetric distribution is in both ends about concrete box beam inside, be adjusted into case back board by the beam -ends, can avoid at beam -endsprestress tensioning strand, can be able to avoid to adopt because of the restriction in beam -ends prestressed steel beam stretch -draw space and pursue the shortcoming that allies oneself with the construction, in the aspect of the construction tissue, can effectively solve the difficult problem in the aspect of the arrangement of construction process, can effectively shorten construction period, it is long big more to t