Pre-tensioning installation construction method for horizontal steel-concrete combined section of special-shaped landscape bridge

The invention discloses a special-shaped landscape bridge horizontal steel-concrete combined section pre-tensioning installation construction method, and relates to the field of bridge horizontal steel-concrete combined section pre-tensioning. The method comprises the following steps that S1, steel box girder sections in a steel-concrete combined section are hoisted; s2, PBL shear keys in steel box girder sections in the steel-concrete combined section are constructed; s3, a positioning tool is installed, and displacement of the tensioning anchor and the steel bar cantilever end is limited; s4, the tensioning anchors and the steel bars penetrate through the rib plates of the steel box girder sections, and the tensioning anchors are anchored; s5, pre-tensioning construction of the steel-concrete combined section is conducted; s6, steel-concrete combined section concrete section pouring construction is carried out; s7, steel-concrete combined section tensioning construction is conducted; the positioning tool co