Wuchang Shipyard was born "the world's first beam"

A bridge steel box girder with a length of 103 meters, a width of 19 meters and a weight of more than 1300 tons was built at Wuchang Shipyard and successfully launched. According to experts, the steel box girder is the main span steel box girder for the widening reconstruction project of the Chongqing Shibanpo Yangtze River Bridge. Its construction size and weight are the world's largest single-section steel box girder.

The widening renovation project of the Chongqing Shibanpo Yangtze River Bridge is to build a bridge of the same type 5 meters upstream of the bridge to alleviate the traffic pressure in downtown Chongqing. In order to ensure the smooth flow of the main channel of the Yangtze River, the 330-meter main span of the bridge crosses the river, which is a pioneering work in the history of the world T-shaped steel-mixed bridge. It is reported that the 330 m main span is made of concrete at both ends, and China is a 110 m long steel box girder. The steel box girder is divided into three sections, two of which are 4 m long in length with the concrete embedded section, and the main beam section is 103 m long. After undertaking the steel box construction task, Wuchang Shipyard has carefully constructed with the comprehensive advantages of technology, site, equipment and transportation. After the completion of the project, the error of the 103 m main beam section of the steel box girder is only 3 mm.

Because the steel box girder is very large, it can only be transported by water to make it “sail” from Wuhan to Chongqing. To this end, the martial art built the steel box girder as a ship, installed the "spoon" in its head, and installed the signal lights and tethers required for the navigation of the ship in the upper part, and carried out a full sealing inspection of the box to ensure steel. The box girder is in a "sail" in the 1286-kilometer waterway from Wuhan to Chongqing. According to the transportation hoisting plan, the steel box girder will arrive in Chongqing 20 days after launching, and will be steered by the on-site tooling at 90 degrees, then hoisted by a large floating crane, embedded on the main span, and finally welded to the dragon. The industry said that the final welding of the dragon. According to industry insiders, the overall manufacture, launching, floating, steering and field hoisting of such large-volume, large-tonnage steel box girders are rare in the history of bridges in China and the world.

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