Swivel support for bridge construction

The invention discloses a swivel support for bridge construction. A rotary supporting ring seat is arranged to improve the supporting capacity during rotation, an annular hydraulic oil film cavity isformed between the bottom wall of the rotary supporting ring seat and the inner wall in a supporting disc, floating support is carried out in an oil film manner to improve the supporting capacity, andspecifically, the pressure of the oil film can be controlled by a pressure control valve in an oil receiving flow channel, so the replacement of the oil film can be effectively realized, and the support capability is improved. The cavity depth of the connecting position of the hydraulic oil film cavity and a hydraulic oil supply mechanism is far away from the cavity depth of the connecting position, so that the hydraulic oil film in the hydraulic oil film cavity is in a wedge shape on the cross section of the vertical plane, and then oil film floating supporting of the rotary supporting ringbase is achieved through th