The invention relates to the technical field of railway ballastless
track disease elimination, in particular to a railway ballastless track supporting layer and lower structure detaching and replacing method. During a
skylight point period,
cut track plates are removed, and temporary steel tracks are erected on a region to be constructed to be connected with existing tracks; during the
skylight point period, the temporary steel tracks are detached, steel
cushion beams are erected on the region to be constructed, passing steel tracks are laid on the steel
cushion beams to be connected with the existing tracks, and supporting
layers below the passing steel tracks are detached; during the
skylight point period, concrete is poured below the passing steel tracks to form new supporting
layers; and the operation is sequentially cyclically and alternately conducted till all the supporting
layers are replaced. By the adoption of the railway ballastless track supporting layer and lower structure detaching and replacing method, the steel
cushion beams are used for erecting the region to be constructed up to support the passing steel tracks, normal operation along a railway can be achieved, a shutdown is not needed, and normal operation of the tracks is guaranteed. In addition,
disease problems existing in the supporting layers below the tracks and a lower structure can be thoroughly solved, potential track safety hazards are thoroughly eliminated, and the popularization value is extremely large.