en.Wedoany.com Reported - The first standard segment steel box girder of the Liu Wudian Channel Bridge on the Xiamen-Jinmen Bridge (Xiamen Section), surveyed and designed by CCCC Highway Consultants Co., Ltd. (hereinafter referred to as GHCC), has been successfully installed, marking the entry of the Liu Wudian Channel Bridge into the large-scale girder erection phase. On June 22, a steel box girder weighing 280 tons was lifted to a height of 70 meters and connected to the main cable slings. This installation has laid the foundation for the goal of opening the main sea route bridge to traffic.
The Xiamen-Jinmen Bridge (Xiamen Section), also known as the Third Eastern Passage of Xiamen, has a total length of 19.725 kilometers. It adopts the standard of an eight-lane bidirectional expressway, with a design speed of 100 km/h for the main sea route bridge. The Liu Wudian Channel Bridge is a five-span continuous, three-span suspension bridge with steel box girders. It has a main span of 928 meters and a total length of 1,948 meters, making it the first fully offshore sea suspension bridge in Fujian Province and the bridge with the largest span in the province. The main girder is 48.2 meters wide and 4.5 meters high, with standard segments measuring 13 meters in length. The entire bridge is divided into 154 small girder segments, of which 112 segments are hoisted using cable cranes, while the remaining segments are assembled into 10 zero-block segments and 4 large side-span segments before being hoisted using floating cranes. The girder segment hoisted this time is located at the mid-span of the main span, weighing 280 tons. The completion of the first standard segment hoisting marks the bridge construction entering the sprint phase, providing conditions for the connection of the main sea route project.
The design team led by Meng Fanchao, a master of engineering survey and design in China, chief expert of GHCC, and chief designer of the Xiamen-Jinmen Bridge (Xiamen Section), conducted multiple rounds of comparison and verification through wind tunnel tests in the early design stage, targeting the characteristics of high basic wind speed and complex wind environment at the bridge site. Ultimately, horizontal stabilizing plates with 45-degree inward-inclined skirts were installed on the main girder as vibration suppression measures, ensuring that the critical flutter wind speed of the main girder exceeds 104 m/s, thereby guaranteeing the bridge's health, safety, and century-long durability.
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