Cast-in-place pile construction mechanism for strong karst development and overlying super-thick backfill soil layer

The utility model relates to the field of geotechnical engineering, in particular to a cast-in-place pile construction mechanism for a strong karst development and overlying super-thick backfill soil layer. Comprising a backfill soil layer consolidation structure constructed in a backfill soil layer and a karst strong development layer consolidation structure constructed in a karst strong development layer, and a cast-in-place pile penetrates through the karst strong development layer consolidation structure and the backfill soil layer consolidation structure from bottom to top. According to the technology, construction materials can be greatly saved, the construction cost can be reduced, the reinforcing bodies are meshed with one another, the problems of hole collapse, hole shrinkage, slurry loss during concrete pouring and the like can be effectively prevented, the pile forming quality is guaranteed, and the technology has the advantages of accurate reinforcing, high reinforcing quality, energy conservation