The invention provides a cast-in-place
pile post-grouting construction technology. The technology comprises the following steps that at least two first grouting pipes are circumferentially arranged onthe
pile side along the outer side of a reinforcement cage, at least two second grouting pipes are arranged at a
pile end, and the first grouting pipes and the second grouting pipes are connected with a grouting device separately;
cement slurry needing to be grouted is prepared; when the concrete strength reaches 10-15 Mpa, a
grout pump is adopted for opening the first grouting pipes and the second grouting
pipe; when the concrete strength reaches 50%-75% of a design value, the prepared
cement slurry is subjected to secondary grouting through the first grouting pipes and the second grouting pipes; the quality of secondary grouting is inspected and accepted. According to the post-grouting construction technology, the pile end supporting layer and the pile side condition can be effectivelyimproved, the pile end resistance and pile side
frictional resistance are improved, the load transmitting property is improved, the single pile
bearing capacity is greatly increased, the
settling volume is reduced, it is guaranteed that the grouting process is performed smoothly, and the grouting quality is improved.