Large-diameter precast pile drilling pre-righting structure

The utility model discloses a large-diameter precast pile drilling pre-righting structure which comprises a wall protecting pile hole formed in the outer circle edge of a center pillar drilling hole, thick-wall steel pipes are arranged in the wall protecting pile hole, and a connecting structure is arranged between the thick-wall steel pipes. Soilbags and filling materials are arranged in gaps between the thick-wall steel pipes and the retaining wall pile holes, and vibration rods are arranged in one or more soilbags; the multiple thick-wall steel pipes are arranged on soft soil on the opposite side of partial rock in an arc shape. A pile casing is arranged on the upper portion of the center pillar drill hole. The utility model has the advantages that the thick-wall steel pipe placed in the wall protection pile hole can provide stable radial constraint for drilling of the drill bit, and if the drill bit deflects, the thick-wall steel pipe can play a role of a guide rail to correct the deflected drill bit, so