Cast-in-situ bored pile for deep and thick mud pit

The utility model discloses a cast-in-situ bored pile for a deep mud pit, which belongs to the technical field of cast-in-situ bored piles and comprises a pile casing, a mounting seat is arranged at the bottom of the pile casing, an insertion block is fixedly connected to the bottom end of the mounting seat, a plurality of through grooves are formed in the pile casing, bumps are arranged in the through grooves, one side of each bump is fixedly connected with a limiting plate, and the limiting plates are fixedly connected with the mounting seat. A first reinforcing assembly and a second reinforcing assembly are arranged in the pile casing. The sliding plates are horizontally moved, so that the protruding blocks are inserted into the side wall of a drill hole, the side wall of the pile casing can be fixed, the first connecting plate, the second connecting plate and the sliding plates are arranged, the overall strength is improved, concrete is injected into the pile casing, the pile casing is submerged by the co