On March 28, as the bridge erection machine slowly glued and positioned the last segmental girder of Ramp B into place, it marked another solid step forward in segmental girder erection technology for the Xincheng Interchange EPC Project Department of China Railway Major Bridge Engineering Group.

　　It is reported that the segmental girder erection technology is being applied for the first time by the Sixth Company of China Railway Major Bridge Engineering Group. Before girder erection, the project established a construction team and organized relevant personnel to discuss the plan. In response to potential problems and difficulties during segmental girder erection, solutions were proposed: First, before the bridge erection machine moves to the next span, the pier-top segments serve as the support surface for the erection machine's legs, so they must be installed in advance and temporarily fixed. For the middle pier top segments, 8-φ32 precision-rolled threaded rebars embedded in the pier top plus shimming on the pier top are used to anchor them integrally with the pier body. Second, during segmental girder erection, operators should use thin steel shims or rubber pads to temporarily fill the joints between beam segments to prevent damage from collision. After the segments are stable, remove the thin steel shims and use the longitudinal and transverse oil cylinders of the overhead crane to adjust the box girder in three directions, so that the matching surface elevation is consistent with the first segment and the shear keys fit well with the first segment. Third, technical personnel should check the elevation, centerline, and matching surface of the segmental girders, as well as the alignment of prestressed duct joints. After passing inspection, mark them with a whiteboard marker for easy alignment after gluing. Fourth, move the girder body away by 15 cm for epoxy resin application. Fifth, conduct safety and technical briefings for on-site construction personnel to ensure their safety and the successful erection of segmental girders.

　　The successful erection of this segmental girder greatly enhanced the confidence of on-site technical personnel, filled a gap in segmental girder erection technology, and played a positive role in promoting subsequent segmental girder erection construction.