STRUCTURE AND CONSTRUCTION METHOD OF PRESTRESSED PRECAST BEAM

PURPOSE: A structure and a construction method of a prestressed precast box beam are provided to prevent damage to a precast box beam by effectively resisting tensile strength applied to the precast box beam. CONSTITUTION: A structure method of a prestressed precast box beam comprises a flange portion(100), webs(200), front and rear finishing portions(300,400), partition portions(500), multiple lower strands(600), and upper strands(700). The webs are formed on both surfaces of the flange portion. The front and rear finishing portions are formed on the front and rear surfaces of the flange portion. The partition portions are formed between the webs. The lower strands are linearly tensioned inside the flange portion using a pretension method. The centers of the upper strands pass through the bottom ends of the webs. The upper strands are tensioned using a post tension method.