Noise reduction tenon-and-mortise type bridge comb plate expansion joint device and installation method

The invention relates to the field of bridge engineering, and provides a noise reduction tenon-and-mortise type bridge comb plate expansion joint device and a mounting method.The noise reduction tenon-and-mortise type bridge comb plate expansion joint device comprises a first fixing block and a second fixing block, the first fixing block is provided with a tenon-and-mortise assembly, the tenon-and-mortise assembly comprises a reserved groove, a tenon and a mortise, the tenon is mounted in the mortise, and the tenon is mounted in the reserved groove; the preformed groove is formed between the mortises, the tenon and the preformed groove form a movable space, and a rotating shaft is arranged in the preformed groove; the comb tooth plate assembly comprises a first comb tooth plate and a second comb tooth plate which are in butt joint with each other, the second comb tooth plate is connected with the second fixing block, and the rotating shaft is arranged at the end, away from the comb teeth, of the first comb to