While-drilling pipe-following drainage anti-floating pile and construction method thereof

The invention belongs to the technical field of pile foundation construction in building construction, and particularly relates to a while-drilling pipe-following drainage anti-floating pile and a construction method thereof. The while-drilling pipe-following drainage anti-floating pile comprises an anti-floating pile body, a through channel is formed in the middle of the anti-floating pile body in the length direction of the anti-floating pile body, and a pipe pile inner cavity is formed; a reinforcing mesh and a pile side grouting pipe are arranged in the pipe wall of the anti-floating pile, a plurality of drainage holes arranged at intervals are formed in the pipe wall of the anti-floating pile, and permeable reinforced concrete structures are arranged in the drainage holes. Compared with the prior art, according to the anti-floating pile, a pipe-following-while-drilling pile is transformed into the large-diameter pipe-following-while-drilling drainage anti-floating pile with the drainage function, the inn