On March 24, 2024, the Changtai Yangtze River Bridge in Changzhou, Jiangsu Province, ushered in important progress. The steel girder of the Changzhou side span of the main channel bridge was successfully closed, marking that the bridge officially entered the sprint stage of full bridge closure.

The closing construction of steel beams on the side of the main channel bridge of Changtai Yangtze River Bridge is very complicated, and its final closing distance is only 1.1 meters, which is like a thin "gap" on the bridge with a total length of 10 kilometers. In order to complete this "stitching" task with high quality, the precision is strictly controlled within 2 mm, and the construction team must master the fine skills like "embroidery". Before closing, the team made full use of BIM technology and field measured data to simulate, and repeatedly rehearsed and exercised through the digital system to ensure complete preparation for the accurate closing of the steel beam side span.

In the key link of pushing and closing, the construction team carefully planned, arranged 32 sets of jacks at the top of pier No. 7 and No. 8 and the steel beam Z16 node, and divided them into vertical, horizontal and vertical groups. These jacks work together under the precise control of the intelligent synchronous system, combined with BIM monitoring technology, to fine-tune the mileage, axis and elevation deviation of the steel beam. Through the joint efforts of the team, the precise closure of the side span of the steel beam was finally realized, laying a solid foundation for the sprint stage of the bridge's full bridge closure. Editor/Wang Tian