Drainage method for steel box girder bridge floor

The invention discloses a steel box girder bridge floor drainage method, and relates to the technical field of bridge floor drainage, the method comprises the following steps: 1, steel plate installation and asphalt paving: after the whole construction of a steel box girder is completed, carrying out sand blasting derusting on a steel bridge floor, then carrying out steel plate installation, and finally carrying out asphalt paving on the bridge floor; the prefabricated drainage ditches and the drainage grooves are installed after asphalt paving is completed, the prefabricated drainage ditches are formed in the sides, away from the steel bridge deck, of the steel plates, and the drainage grooves are installed in the prefabricated drainage ditches; by arranging the steel plate, the paver can pave a bridge deck more quickly and more accurately; precision of steel bridge deck pavement construction is guaranteed, asphalt pavement amount is saved, asphalt construction efficiency is improved, drainage capacity of dr