Ballast bed reinforcement cage capable of resisting separation of ballast bed and duct piece

The utility model relates to the technical field of civil engineering, and discloses a ballast bed reinforcement cage for resisting disengaging of a ballast bed and a duct piece, which comprises a cage body, a tie bar and a bolt, the cage body is arranged at the bottom of the inner side of a tunnel duct piece, the bolt is used for assembling and connecting adjacent duct pieces, one end of the tie bar is fixed on the cage body, and the other end of the tie bar is connected to the other end of the bolt. Therefore, the load borne by the cage body is transmitted to the bolt for sharing. According to the ballast bed reinforcement cage capable of resisting disengaging of the ballast bed and the duct piece, the cage body is firmly connected with the tunnel duct piece bolt through the tie bar, the tie bar can transmit a certain load to the bolt on the tunnel duct piece, and therefore the tunnel duct piece and the ballast bed reinforcement cage form an effective restraining and fixing relation. And the occurrence of v