Settings: XPB-90 high pressure pump, 6 cubic air compressor, cement mixing tank, one gas storage tank Construction steps: 1. The construction site is arranged and levelled, and the pile positions are arranged and marked with sticks according to the drawings. 2. After the rig is in position, use a level to adjust the Angle of the rig's propulsion frame. If there is a high or low level, use the leg to adjust. 3, connect a drill rod and drill, open the air compressor, high pressure pump for pressure test. 4, after the completion of the pressure test, the drill pipe of the good point is drilled successively, and the drill is quickly drilled to the required depth, and then the rotary injection operation is carried out. Lifting speed 15cm/min Rotational speed 25r/min Cement slurry pressure 28MPa Air pressure 0.7MPa 5, pay attention to the regrouting situation, the drilling rig after lifting and spraying a drill pipe to remove the drill pipe and clean, prevent Cement solidified in the drill pipe hole and blocked the drill pipe. 6. Lift to one meter above the ground to stop the shotcrete, pull out the drill pipe, and move the machine to the next pile site for construction. 7. Insert section steel at 45° 8, noon rest and night before work to clean the high pressure pump, drill pipe, high pressure pipe with water to prevent the stop time is too long cement slurry blocking the pipeline and drill pipe.