Shield tunnel segment reinforcing structure

The utility model relates to the technical field of tunnel construction, in particular to a shield tunnel segment reinforcing structure which comprises a plurality of steel plate rings which are spliced with one another and matched with a tunnel body, and the steel plate rings are fixedly connected with tunnel segments on the inner wall of the tunnel body through bonding layers. A plurality of splicing protruding plates of a smooth arc-shaped structure are evenly arranged at one splicing end of each steel plate ring, a plurality of splicing grooves matched with the splicing protruding plates are formed in the other splicing end of each steel plate ring, and the splicing ends of the steel plate rings at the lower ends of the two sides of the tunnel body are provided with the splicing protruding plates or the splicing grooves. Every two adjacent steel plate rings are spliced to form a welding groove with a triangular section, every two adjacent steel plate rings are welded at the corresponding welding groove, a