Self-bottom-sealing type pipe pile core concrete reinforcement cage system for pile splicing

The utility model discloses a self-sealing bottom type pipe pile core concrete reinforcement cage system for pile splicing, which comprises an upper end expanding pile head section, a middle trumpet-shaped external expanding section and a lower end pile core connecting section which are sequentially connected, and the pile core connecting section is arranged in a hollow pipe hole at the upper end of a prestressed concrete pipe pile. A pile core cage bottom sealing plate is arranged at the lower end of the pile core connecting section, an annular sealing ring is arranged on the outer side of the pile core cage bottom sealing plate, and the annular sealing ring is extruded on the inner wall of the prestressed concrete pipe pile. The self-bottom-sealing type pipe pile core concrete reinforcement cage system for pile splicing is compact in structure, good in stability, large in supporting strength, capable of conveniently conducting cast-in-place concrete pile splicing operation with a prestressed concrete pipe p