Device for detecting diameter, hole depth and sediment thickness of cast-in-place pile

The utility model discloses a device for detecting the diameter, the hole depth and the sediment thickness of a cast-in-place pile. The device comprises a diameter measuring disc, a hole depth measuring column, a first pull rope and a second pull rope, the diameter measuring disc is of a plane annular structure, and the outer diameter of the diameter measuring disc is consistent with the diameter of a designed pile hole of a cast-in-place pile formed hole, so that the diameter measuring disc can be arranged on the upper surface of a sediment layer. The hole depth measuring column penetrates through the diameter measuring disc, so that the lower end of the hole depth measuring column can extend to the pile hole bottom of the cast-in-place pile hole; one end of the first pull rope is connected with the diameter measuring disc, one end of the second pull rope is connected with the hole depth measuring column, and the other end of the first pull rope and the other end of the second pull rope extend to the positio