Pile-column integrated temporary deep foundation pit stand column device in coastal area

The utility model belongs to the technical field of building foundation pit construction, and particularly relates to a coastal area pile-column integrated temporary deep foundation pit stand column device which comprises an upper-layer steel cylinder, a lower-layer steel cylinder and a concrete supporting beam fixedly connected with the upper-layer steel cylinder and is characterized by further comprising a bracket structure, a foundation structure and a water stop structure. The bracket structure is fixedly connected with the upper-layer steel cylinder, the foundation structure is fixedly connected with the lower-layer steel cylinder, and the upper-layer steel cylinder is fixedly connected with the lower-layer steel cylinder; the water stopping structure comprises an external water stopping plate, an internal water stopping plate and a water stopping sealing plate, the external water stopping plate is welded to the periphery of the side wall of the lower-layer steel cylinder, the internal water stopping pla