Large span concrete structure fracture surface construction method

The invention relates to the field of road engineering construction, in particular to a large span concrete structure fracture surface construction method. The method includes the steps that custom-made polystyrene foam columns are covered by asbeston, and according to the design length requirement, mandrels with various lengths are produced; according to the design requirement, the mandrel positions are set out; mandrel locating supports which are in welding connection with main rebars are made, and the mandrels are tightly fixed with the main rebars adopting a rebar welding mode; and concrete pouring is carried out. The large span concrete structure fracture surface construction method is low in cost, simple in construction and short in construction duration. 本发明涉及道路工程施工领域，特别涉及种大跨径混凝土结构断面施工方法。它包括以下步骤：将定做的聚苯乙烯泡沫柱用防火布包裹，按照设计长度需要，制作出不同长度的芯模；按照设计要求，进行芯模位置放样；制作与主体钢筋焊接的芯模定位支架，采用钢筋焊接的方式将芯模与主体钢筋固定牢靠；进行混凝土浇筑。本发明成本低、施工简单、施工工期短。