Inner cover plate structure of tubular pile cavity

The utility model relates to a tubular pile cavity inner cover plate structure which comprises a tubular pile, an inverted-truncated-cone-shaped mounting groove is formed in the top of a tubular pile cavity, a cover plate device is arranged in the mounting groove and comprises a rubber ring, a top plate and a bottom plate, and the outer side of the rubber ring is attached to the upper portion of the mounting groove and the upper portion of the tubular pile cavity. A cylindrical containing cavity is formed in the inner side of the rubber ring, the top plate is arranged in the containing cavity and attached to the containing cavity, the bottom plate is arranged at the bottom of the rubber ring, and the rubber ring, the top plate and the bottom plate are connected through bolts. The installation groove and the cover plate device are matched with each other, the whole cover plate device is located below the top face of the pipe pile while good leakproofness is achieved, the cover plate device does not make contac