Linear control method for ballastless track of large-span steel truss girder structure

The invention discloses a linear control method for a ballastless track of a large-span steel truss girder structure, which is characterized by comprising the following steps of: S1, acquiring an initial beam surface linear shape of a bridge to be subjected to track laying; s2, pre-loading the bridge to be subjected to track laying in sections according to a preset sequence, and respectively obtaining the actual beam surface line shape of each section after pre-loading; s3, on the basis of the initial beam surface line shape and the actual beam surface line shape, obtaining a corresponding relation between a pre-loaded load and a beam surface deformation amount; and S4, based on the corresponding relation and the initial beam surface line shape, the pre-camber of the bridge to be subjected to rail laying is adjusted, so that the actual line shape of the main beam is close to the beam surface design line shape. Compared with the prior art, the linear control method for the ballastless track of the large-span s