Grouting reinforcement device for overlying soil layer on karst cave in karst area

The utility model discloses a grouting reinforcement device for an overburden layer on a karst cave in a karst area, which relates to a foundation reinforcement technology in the field of rock soil and comprises a slurry inlet pipe, a slurry return pipe, a floral tube, an overflow valve and a hole sealing device, a pressure gauge and a slurry inlet valve are arranged on the slurry inlet pipe, a slurry return valve is arranged on the slurry return pipe, a floral hole and a rotating blade are arranged at the bottom of the floral tube, and the overflow valve is arranged on the floral tube. An extrusion disc is arranged on the outer side of the floral tube in a sleeving mode, a pressing rod is arranged on the upper side of the extrusion disc, the hole sealing device comprises a hole sealing cover, a circular ring and four supporting plates distributed in a cross mode, four T-shaped sliding grooves distributed in a cross mode are formed in the lower side of the hole sealing cover, and T-shaped sliding blocks match