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Xiamen-Jinmen Bridge sets maritime engineering milestone with 4,225-ton shield installation, gigantic steel caisson fortifies west pylon in record-breaking offshore operation

Time:2025-03-11 15:42:00 Source: Youth.cn China Youth International
 

Beijing, March 11 (Youth.cn) On March 9, 2025, in Xiamen City, Fujian Province, in a groundbreaking maritime engineering feat, the west pylon of the Liuwudian Navigation Bridge, a critical component of the cross-strait Xiamen-Jinmen Bridge (Xiamen Section) project, successfully received its permanent 4,225-ton anti-collision steel caisson. Constructed by China Communications Construction Company Second Harbor Engineering Company Ltd. (CCCC-SHEC), this monumental installation marks a technological leap in coastal infrastructure protection.

The dumbbell-shaped double-walled steel caisson, measuring 105.8 meters in length, 47 meters in width, and 11.7 meters in height, represents China's heaviest permanent marine collision-prevention structure. Fabricated from high-strength marine-grade steel with modular construction techniques, its multi-layered defense system can withstand equivalent impact forces , extending the bridge's service life through optimized stress distribution.

The engineering team deployed the "Erhang Zhuoyue" floating crane with 5,500-ton lifting capacity for this precision offshore engineering maneuver. Advanced BIM-guided positioning systems enabled single-lift installation within a 3-hour tidal window, reducing traditional assembly phases while achieving alignment accuracy. Photo/CFP

Editor:Wang Zimu
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