中国最大跨海悬索桥主塔实现“云端合龙”

Core Viewpoint - The successful installation of the last horizontal beam on the main tower of the Shuangyumeng Bridge marks a significant milestone in the construction of China's largest single-span steel box girder suspension bridge, which has a main span of 1,768 meters [1][2]. Group 1: Construction and Technology - The construction of the Shuangyumeng Bridge showcases the "Zhoushan manufacturing" strength and the advanced bridge technology of China [2]. - China Railway Baogao (Zhoushan) Co., Ltd. is responsible for the manufacturing of the main tower's steel structure, achieving a full-process "smart manufacturing" from plate cutting to steel beam coating [2]. - The use of intelligent welding robots combined with real-time quality monitoring systems has resulted in a welding first-pass qualification rate of over 99.5%, with efficiency improvements exceeding 40% year-on-year [2]. Group 2: Innovative Techniques - Several techniques used in the bridge construction are innovative, including a "steel frame + prefabricated concrete components" structure for the tower [2]. - The construction team has implemented a "ground prefabrication and overall hoisting" approach, enhancing quality and efficiency akin to "building with blocks" [2]. - The application of "digital twin" pre-assembly has effectively reduced risks associated with offshore construction [2]. Group 3: Economic Impact - Upon completion, the second phase of the Ningbo-Zhoushan Port Six Horizontal Highway Bridge will enhance the collection and distribution network of the Ningbo-Zhoushan Port, providing a boost to the marine economy of Zhejiang and facilitating the integration of the Yangtze River Delta [2].