METHOD OF PREVENTING FLYING SALINITY FROM ADHERED TO GIRDER OF PLATE GIRDER BRIDGE, BOX GIRDER BRIDGE, AND GIRDER BRIDGE

摘要

PROBLEM TO BE SOLVED: To provide a method of preventing flying salinity from adhered to the girder of a plate girder bridge and a box girder bridge comprising respective plate girders and box girders, and a girder bridge which is suitably used for steel bridges which are shortened in life due to the adhesion of flying salinity thereto promoting rusting and which reduces the adhesion of flying salinity thereto.SOLUTION: This plate girder bridge includes a plurality of plate girders and auxiliary installations for a plate girder bridge such as a means for decelerating the velocity of a circulation flow produced between the adjacent plate girders, for example, members which are installed on the plate girders or between the adjacent plate girders and structured so as to decelerate the velocity while allowing the circulation flow to pass therethrough, and an inspection path and a transportation tube which are installed at positions where the shearing force of a burble flow from the lower surface producing the circulation flow is weakened. A circulation flow deceleration means is installed on the girders or between the girders beforehand so that the velocity of the circulation flow produced between the plurality of girders can be decelerated.