Structure for preventing mold expansion and slurry leakage at end of prestress prefabricated box beam and construction method of structure

The invention belongs to the technical field of refining construction of a prestress reinforced concrete prefabricated box beam and discloses a structure for preventing mold expansion and slurry leakage at an end of a prestress prefabricated box beam and a construction method of the structure. The structure is mainly characterized in that high-density foamed sponge is clung to a side ridge of a box beam end mold plate corresponding to a box beam side mold, and the high-density foamed sponge is compressed by the side ridge of the box beam end mold plate and the box beam side mold for a certainratio. The construction method mainly comprises the following steps: a, confirming the position of the box beam end mold plate at the box beam side mold; b, clinging the cut high-density foamed spongeto the side ridge of the box beam end mold plate; c, mounting the box beam end mold plate in an appointed position of the box beam side mold, and fastening and compressing the high-density foamed sponge for a certain ratio; d