Pile head plugging device for PHC prefabricated pipe pile construction

The invention provides a pile head plugging device for PHC prefabricated pipe pile construction, and relates to the technical field of PHC prestressed pipe pile construction. The clamping seat is of a cross-shaped mechanism, a sliding cavity is formed in the clamping seat in a penetrating mode, one end of the clamping seat is located in the hollow base, and the middle of the clamping seat abuts against the top face of the hollow base; a plurality of limiting pieces are slidably connected to the end, located in the hollow base, of the clamping base at intervals, one end of each limiting piece is located in the sliding cavity, and the other end of each limiting piece can be clamped to the hollow base. The extrusion piece is of a T-shaped structure, one end of the extrusion piece is located in the sliding cavity and slidably connected with the end, located in the sliding cavity, of the limiting piece, the end, away from the limiting piece, of the extrusion piece is detachably connected with the end, close to the