Direct-type high-pressure grout curtain connection structure in thin lining-grouting cave

The utility model discloses a direct-type high-pressure grout curtain connection structure in a thin lining-grouting cave, which comprises a thin lining-grouting cave, an upper curtain, a lower curtain and a lap curtain, wherein the thickness of a concrete lining in the thin lining-grouting cave is 25-30cm, and the concrete lining is subjected to single-layer reinforcement arrangement; the upstream part of the center of the thin lining-grouting cave is provided with a short anchor bar, and in combination of the utilization of backfill grouting and consolidation grouting measures, a gap between the wall of the cave and the lining and fractures in rock masses around the grouting cave can be plugged, so that the bearing capacity of a lining structure is effectively improved and the acting force of slurry pressure on a center thin lining in the process of carrying out high-pressure grouting on the curtains is reduced, the deformation of the lining is small, and no slurry spillover and slurry leakage phenomenon oc