Structure for guaranteeing hole forming quality of concrete cast-in-situ bored pile through powder spraying pile annular reinforcement

The utility model relates to a structure for guaranteeing the hole-forming quality of a concrete cast-in-situ bored pile through powder spraying pile annular reinforcement, which comprises a reinforcement structure arranged along the inner wall of the concrete cast-in-situ bored pile, and the reinforcement structure is at least one circle of powder spraying piles which are continuously arranged. The concrete cast-in-situ bored pile has the advantages that reinforcement is conducted through the multiple circles of powder spraying piles which are continuously arranged, pile hole deformation is prevented, the hole forming quality of the concrete cast-in-situ bored pile under the geological condition of deep and thick silt silty clay is guaranteed, quality accidents such as hole shrinkage, hole collapse, necking down, pile breaking and the situation that the bearing capacity of a pile foundation cannot meet the design requirement are avoided, the sediment thickness is reduced, and the service life of the pile fou