Tunnel secondary lining anti-disengaging formwork grouting structure and construction method thereof

The invention discloses a tunnel secondary lining void-preventing belt mold grouting structure which comprises a lining trolley, a scale pipe coiling device, a void grouting pipe and a rigid connecting pipe, the rigid connecting pipe is located between the tail end of the void grouting pipe and a slurry supply pipe, and a mounting top plate is arranged at the top of the lining trolley; the installation top plate is provided with a plurality of pouring windows and vibrating windows, a plurality of RPC grouting pipes and a plurality of concrete vibrators are arranged on the installation top plate, and the disengaging grouting pipe is arranged on the scale pipe rolling device in a winding mode and arranged at the position, corresponding to the top of the secondary lining, below the waterproof plate. After the secondary lining is formed, the concrete strength can meet the design strength requirement, the vault disengaging phenomenon is reduced, the annular construction joint concrete is compact and not prone to g