Self-resetting bridge pier anti-collision guardrail structure

The self-resetting bridge pier anti-collision guardrail structure is characterized in that the outer wall of a pier is slidably sleeved with an inner cylinder, and the outer wall of the inner cylinder is fixedly sleeved with a floating bag used for adjusting the height of the inner cylinder according to the water level; the outer wall of the inner cylinder is sleeved with an outer cylinder, the outer cylinder is fixedly connected with the floating bag, a plurality of sliding plates are arranged on the outer wall of the outer cylinder, a plurality of guide rollers used for guiding a ship body are arranged on the outer walls of the sliding plates, a containing cavity is formed among the inner cylinder, the outer cylinder and the floating bag, and the containing cavity is filled with foam concrete; the buffering mechanism is arranged between the sliding plate and the outer cylinder and used for buffering the impact force and protecting the pier conveniently. The energy absorption mechanism is arranged between th