Longitudinal bar laying tool and method for web of steel reinforcement framework of sliding type prefabricated box girder

The invention belongs to the field of prefabricated box girder U-shaped reinforcement cage manufacturing, and particularly relates to a sliding type prefabricated box girder reinforcement cage web longitudinal bar laying tool which comprises a web distributing tool, a longitudinal bar distributing tool and a longitudinal bar distributing platform. The web plate material distribution tool is provided with supporting rods corresponding to the two sides of the U-shaped stirrup, and a plurality of clamps are rotationally installed on the supporting rods. The fixture is provided with an avoiding position not exceeding the opposite surface of the supporting rod and a working position for supporting a reinforcing steel bar; the rotation of each fixture is independently controlled by a driving mechanism, and each fixture realizes the locking of a working position through a locking mechanism; the invention further provides a sliding type prefabricated box girder steel reinforcement framework web longitudinal bar layin