Construction method for splicing prefabricated segmental bridges

A construction method for splicing prefabricated segmental bridges, wherein the prefabricated segmental bridge comprises a plurality of prefabricated segments, consisting of pier-top segments and non-pier-top segments distinct from the pier-top segments, characterized in that the construction method includes the following steps:

• S1, Manufacturing each prefabricated segment with steel strands embedded along their length direction, with the steel strands in any two adjacent prefabricated segments set in a staggered arrangement, and each non-pier-top segment also having reserved holes for the steel strands from the previously erected prefabricated segment to pass through, these reserved holes traversing the ends of the corresponding non-pier-top segment;
• S2, Erecting the pier-top segment, installing it onto the pier;
• S3, Using beam launching machinery to lift the corresponding non-pier-top segment to the predetermined assembly position, and applying epoxy resin glue on the corresponding adhesive joint surface;
• S4, Threading the embedded steel strands from the previously erected prefabricated segment through the corresponding reserved holes in the non-pier-top segment about to be erected;
• S5, Completing the adhesion of the adhesive joint surface using the beam launching machinery;
• S6, Tensioning the steel strands that have passed through the reserved holes using tensioning equipment before the adhesive joint surface epoxy resin glue sets, to achieve the design-allowed compressive stress, completing the temporary tensioning procedure;
• S7, Releasing the beam launching machinery and moving it to the next construction point;
• S8, Applying permanent prestress;
• S9, Injecting high-strength mortar into the corresponding reserved holes, permanently embedding the steel strands within the corresponding prefabricated segments;
• S10, Repeating steps S3-S9 until all prefabricated segments are assembled.