Steel plate reinforcing method for special floating slab ballast bed shield tunnel structure

The invention relates to a method for reinforcing a special floating slab ballast bed shield tunnel structure steel plate. The method comprises the following steps that concrete, higher than a track plane, of the upper portion of a special floating slab ballast bed is chiseled away; carrying out flattening treatment on the chiseled plane; the arc-shaped steel plates are connected; steel corbels are arranged at the ends of the arc-shaped steel plates at the two ends and are placed on the special floating slab ballast bed, gaps are reserved between the corbels and the special floating slab ballast bed, and rigid connection is not conducted between the corbels and the special floating slab ballast bed; the steel corbels on the two sides are connected through steel braces; an insulating spacer with the adjustable thickness is arranged between the steel brace and the track, and the steel brace is attached to the bottom face of the track bed by adjusting the thickness of the insulating spacer. Compared with the pri