Construction method of pressurized cast-in-place pile based on reinforced fibers and metakaolin

The invention discloses a construction method of a pressurized cast-in-place pile based on reinforced fibers and metakaolin. Fiber reinforced materials such as steel fibers are used, and a geopolymermaterial which is mainly prepared from metakaolin is also employed, so the tensile property and the ductility of the concrete are improved; a foundation pit is excavated on the surface, so the surfaceconstruction waste and coarse-grained soil are removed; through a top steel casing, the concrete construction quality of the pile top is guaranteed; a hollow drill rod is driven by a power device toperform drilling to the designed elevation in foundation soil, and then the hollow drill rod is rotated reversely, wherein in the lifting process, a composite concrete material added with fibers and metakaolin is poured into a cavity in the top of the drill rod and the hollow drill rod through pressurization of a ground pump, and a pile body is formed; and finally embedded steel bars are insertedinto the pile body. The cons