Embedded U-shaped roof expansion joint cover plate and expansion joint waterproof structure

The utility model discloses a pre-embedded U-shaped roof expansion joint cover plate and an expansion joint waterproof structure.The cross section of the expansion joint cover plate is in an inverted U shape, the expansion joint cover plate comprises a cover plate top face and cover plate side faces symmetrically, vertically and downwards extending and arranged on the two sides of the cover plate top face, and an expansion joint reserved tongue-and-groove is formed in the upper end of each cover plate side face in an inwards-concave mode; hook-shaped connecting parts connected with the adjacent expansion joint cover plates are arranged at the two ends of the expansion joint cover plates in the length direction. The roof structure has the characteristics of standardization, light weight, easiness in installation, cost saving, higher practicability and the like, the roof structure and the expansion joint cover plate are integrally arranged after the roof structure and the expansion joint cover plate are used, a