Bridge space radioactive concrete-filled steel tube bridge pier and construction method thereof

A bridge space radioactive concrete-filled steel tube bridge pier comprises a flange, a plurality of bridge pier bottom stiffening plates, four bridge pier support beams, six tie beam stiffening plates, four pier top anchor plates and a plurality of tie beam stiffening plates. Four mounting positions in even distribution along the circumferential direction are reserved on the top surface of the flange; bottom walls of the four bridge pier support beams are mounted at the four mounting positions on the flange respectively; a tapered space is formed by encircling of the four bridge pier support beams, and the cross section of the tapered space is decreased gradually from top to bottom; one pier top anchor plate is mounted on the top wall of each bridge pier support beam; and a plurality of anchor bolt preformed holes in even distribution are reserved on each pier top anchor plate. A pile foundation of the bridge pier is centralized blow a bearing platform, and occupied urban space is small. Formwork-free pourin