Wall-for-grouting-free segmentation drill-hole-cleaning retrogressive controllability grouting method

The invention discloses a wall-for-grouting-free segmentation drill-hole-cleaning retrogressive controllability grouting method. The method is characterized by comprising the first step of using a drilling machine to drill a shallow hole with the depth being 2.5m-3.0m on original wall rock, and stopping a drill rod; the second step of taking an orifice pipe of which the pipe opening is provided with a flange quick connector, and using cement grout to lay the pipe opening on the surface of a hemp thread wrapping layer; the third step of taking a disc which is matched with the flange quick connector on the orifice pipe in the second step, and installing a slurry inlet pipe and a slurry outlet pipe on one side of the disc, wherein a slurry injection pipe is communicated with the slurry inlet pipe; the fourth step of making the orifice pipe which is twined by hemp thread and is laid with the cement grout in the second step enter the shallow hole in the first step in an abutting mode, so that the flange quick conn