The invention discloses a post-grouting bored
pile construction method. The post-grouting bored
pile construction method comprises the following steps of hole forming: measuring a
pile position first,and then vertically burying a pile aligning the center of a steel protective cylinder with the center of a pile hole, and finally, drilling to form a hole; after the hole is drilled to a designed depth, using a hole cleaning
drill bit to clean the hole once; transporting a made steel reinforcement cage to the site through a cage transporting vehicle; lowering the steel reinforcement cage in place; after a guide
pipe is lowered, carrying out secondary hole cleaning; pouring concrete to the pile depth within half an hour of secondary hole cleaning; when the pouring is performed to the top of the pile, measuring the elevation of the top of the pile by using a heavy hammer or a measuring rod in real time; and finally, carrying out post-grouting construction, wherein in post-grouting construction, grouting is carried out on the pile side first; and after a grouting liquid is initially set, the grouting liquid is grouted to the bottom of the pile. By using the post-grouting bored pile construction method to construct, harmful effects on adjacent buildings and surrounding environments are small, the length and
diameter of the pile can be freely changed according to design requirements, the end of the pile can enter a supporting layer or can be embedded into a rock stratum; and the
bearing capacity of a single pile is large.