Supporting assembly for supporting bailey truss for arch bridge

The utility model discloses a bailey truss support assembly for arch bridge, which comprises a base, the middle position of the upper surface of the base is rotatably connected with a second screw rod through a bearing, the bottom end of the second screw rod is fixedly welded with a rotating wheel, and the end part of the second screw rod is provided with a support column. A top plate is welded and fixed to the surface of the supporting column, and four internal thread plates are arranged in the supporting column. An internal thread plate is designed on the inner surface of a supporting column, a clamping plate can be clamped in a clamping groove, the internal thread plate is closed on the inner surface of the supporting column, a fixing bolt is screwed to fix the clamping plate, the supporting column and the internal thread plate, a second lead screw is rotationally adjusted through the internal thread plate in the supporting column, and when the internal thread plate is damaged, the internal thread plate is