Dongting Lake Railway Bridge locates in Yueyang City, Hunan Province, spanning Dongting Lake and Xiangjiang River at the junction of Yangtze River, is the key control project of Menghua Railway. With total length of 10,445m and main-bridge length of 1,250m, it is the first three tower cable stayed railway bridge in the world. The construction period is 5 years, and expected completion time is in 2018.
The side-span of bridge at bottomland, steel box girders cannot be transported to bridge site. In addition, this projects has requirement on river navigation and the number of temporary piers is limited.
KATTOR engineering technicians, after repeated on-site exploration and demonstration, finally nailed down the following solution: The steel box girders were erected by 300t crane and launched from main-span to side-span. During construction process, the first steel box girder was launched forward for 14m by KATTOR ILS system. Then the launching nose of 42m was installed by tower crane and floating crane. Followed by hoisting and assembling the remaining steel beams, the whole segment was pushed forward for 14m. After assembly of every section by repeating, the launching nose reached pier #1, then remove launching nose and continue assembly and push box girder forward until the 19th girder reached to designated position.