Tunnel secondary lining concrete cavity prevention device

The utility model discloses a tunnel secondary lining concrete cavity prevention device, which belongs to the technical field of constructional engineering, and is characterized by comprising a mounting frame, a screw rod is rotatably connected between the left side and the right side in the mounting frame through a bearing, and the outer wall of the screw rod is in threaded connection with a connecting block; the vibrating device is arranged at the bottom of the connecting block and used for vibrating concrete and improving the compactness of the concrete, the vibrating device comprises a mounting box fixedly connected to the bottom end of the connecting block, the bottom end of a connecting rod is fixedly connected with a vibrating hammer, a cam is driven to continuously rotate, the vibrating hammer can do up-down reciprocating motion, and during the period, the vibrating hammer is driven to continuously rotate; and a second motor operates to drive a screw rod to rotate, so that a connecting block on the ou