Curtain grouting construction process suitable for karst geology dam project

The invention relates to the field of curtain grouting, and discloses a curtain grouting construction process suitable for a karst geology dam project, which is characterized by comprising the following steps: S1, measuring and positioning: determining a plurality of rows of curtain grouting holes on a dam body corridor; s2, pilot hole drilling is carried out, a segmented water pressing test is carried out on a pilot hole, a rock core is stored, and geological data are recorded; s3, common holes are drilled, a geological core drilling machine is adopted for drilling, and the geological core drilling machine adopts a rotary drilling machine to be matched with a hard alloy or diamond drill bit for drilling and hole forming; s4, a water pressure test and grouting are conducted, specifically, the water pressure test is conducted on a curtain grouting hole, when faults and the like are found in drill holes, pasty grout is introduced for grouting to form a barrier layer, and drilling is conducted after solidificati