Construction method for preventing segregation of concrete poured into pile hole in rock layer containing high confined water

The invention relates to the technical field of concrete segregation, and discloses a construction method for preventing segregation of concrete poured into a pile hole in a rock layer containing high confined water, which comprises the following steps: 1) performing drilling construction to form the pile hole; (2) a reinforcement cage is put into the pile hole, and the periphery of the reinforcement cage is surrounded by a cotton fiber layer; a plurality of first-order grouting pipes and a plurality of second-order grouting pipes are arranged in the reinforcement cage; an annular pipe is arranged, the annular pipe is located between the middle cage and the cotton fiber layer, the annular pipe is communicated with the bottom of the first-order grouting pipe and the bottom of the second-order grouting pipe, and a plurality of grouting openings are formed in the annular pipe; (3) underwater non-dispersible concrete is poured into the pile hole, and a pile body is formed; (4) cement and water glass mixed liquid