Cast-in-situ bored pile post-grouting technology construction method

The invention relates to a cast-in-situ bored pile post-grouting technology construction method. The method comprises the following steps of manufacturing reinforcement cages in a segmented mode; manufacturing a grouting pipe; mounting a reinforcement cage and a grouting pipe; and mixing the cement paste. Slurry permeates into the soil around the loose pile end virtual tip, concrete with high strength is formed through combination, when the permeation capacity of the cement slurry is limited by a surrounding compact soil layer, the pressure is continuously increased, the soil layer at the pile end is extruded, compacted, filled, fixed and permeated, sediment at the bottom of the pile and a disturbed supporting layer at the end of the pile are effectively reinforced or compacted, the connection between the pile and soil is improved, the bearing capacity of soil around the pile is improved, and therefore the bearing capacity of a single pile and settlement and uneven settlement of a foundation are improved. 本发明