Tunnel secondary lining concrete pouring roof punching structure

The utility model provides a tunnel secondary lining concrete pouring top punching structure which comprises a plurality of top punching holes formed in the top of a tunnel secondary lining formwork trolley at intervals in the longitudinal direction, a vertically-arranged jacking pipe is installed in each top punching hole, a top punching pipe is obliquely arranged on one side of each jacking pipe, and the top punching holes are communicated with the top punching holes. A three-way pipe is formed by the jacking pipe, the punching and jacking pipe and an inner cavity of the tunnel secondary lining formwork trolley, a hydraulic jacking mechanism is installed in the jacking pipe, and a pressure sensor is installed on a piston of the hydraulic jacking mechanism. The jacking pipe is changed to be obliquely arranged, after concrete is conveyed for jacking, residual concrete in the jacking pipe and the jacking pipe is jacked into a secondary lining trolley formwork through the hydraulic jacking mechanism, and in the