Mounting frame and mounting method for girder section of auxiliary pier of cable-stayed bridge

The invention relates to the technical field of cable-stayed bridge construction, and provides a mounting frame and a mounting method for a girder section of an auxiliary pier of a cable-stayed bridge. The mounting frame for the girder section of the auxiliary pier of the cable-stayed bridge comprises a near-shore side support, a far-shore side support, a spandrel girder, distribution girders andan operation platform, wherein the near-shore side support and the far-shore side support are arranged in the vertical direction of the auxiliary pier, the spandrel girder is arranged perpendicular tothe near-shore side support and the far-shore side support, and the distribution girders are located on the upper portion of the spandrel girder; the near-shore side support comprises a plurality offirst sub-supports, and every two adjacent first sub-supports are fixedly connected through parallel connection parts and inclined struts; the far-shore side support comprises a plurality of second sub-supports, and every two a