Post-compound grouting structure of cast-in-place pile and construction technology of post-compound grouting structure

The invention provides a cast-in-place pile post-compound grouting structure and a construction technology thereof.The cast-in-place pile post-compound grouting structure comprises a reinforcement cage, a grouting assembly is arranged on the outer side of the reinforcement cage and comprises a spiral grouting pipe arranged on the outer side of the reinforcement cage in a winding mode, the upper end of the spiral grouting pipe is connected with a grouting guide pipe, and the side wall of a spiral pipe at the lower end of the spiral grouting pipe is connected with a plurality of end grouting vertical pipes; the outer side of the spiral grouting pipe is connected with a plurality of lateral grouting branch pipes, conical grouting heads are arranged at the ends of the end grouting vertical pipes and the ends of the lateral grouting branch pipes, and a plurality of grouting holes are distributed in the side walls of the conical grouting heads. According to the grouting structure and technology, it can be guarantee