Diameter-adjustable plug-in vibrating rod and construction method

The invention provides a diameter-adjustable plug-in vibrating rod and a construction method. The vibrating rod comprises a vibrating rod body, a limiting block and a swing mechanism. The swing mechanism comprises a sliding block, a connecting piece and a swing block. One end of the connecting piece is connected with the sliding block, the other end of the connecting piece is connected with the swing block, and the swing block is arranged on the outer side of a vibrating handle and connected to the vibrating rod body through a shaft, so that the swing block gets close to or away from the vibrating handle along with sliding of the sliding block. A gap is formed in the tail end of the vibrating rod body so as to form the vibrating handle, and the caliber of the end, away from the vibrating rod body, of the vibrating handle is smaller than that of the tail end of the vibrating rod body. The vibrating force can be transmitted to the vibrating handle along the vibrating rod body, then concrete is vibrated through