Recently, Baosteel Co., Ltd. won the bid of about 55,000 tons of steel for the Changtai Yangtze River Bridge. This is the first time that Baosteel's high-performance bridge steel has won the bid for a dual-purpose bridge that spans the Yangtze River. It has achieved a full catch-up with competitors in the railway super bridge market. At the same time, the supply of carbon steel and composite panels will be realized within the bid section. This is also the first time that Baosteel Co., Ltd. has launched an impact on the bridge steel composite panel market.

Bridge steel is an important strategic product of Baosteel Co., Ltd. Baosteel Co., Ltd., based on the first release of steel for the fourth, fifth, and sixth generations of long-span railway bridges, will first domestically release the seventh generation of bridge steel for Wuhan Jianghan Seven Bridges in 2020. Baosteel Co., Ltd. has cumulatively participated in the construction of the Zhoushan Island Project, Shanghai Yangtze River Bridge, Nanjing Yangtze River Fourth Bridge, Nanjing Dashengguan Yangtze River Railway Bridge, Hong Kong-Zhuhai-Macao Bridge, Shanghai-Sutong Yangtze River Bridge, Shenzhen-China Corridor and other mega bridge projects for national economy and people's livelihood and have won owners And the processing unit unanimously praised.

Changtai Yangtze River Bridge

The Changtai Yangtze River Bridge is a major domestic project and a core project in the high-speed railway planning in the Yangtze River Delta. It uses a huge amount of steel-270,000 tons of bridge plates, and is technically difficult-adopts the latest TB/T3556-2020 railway The steel standard and high material performance-the entire bridge demand is about 50,000 tons of high-performance and high-strength bridge steel, which ranks first in the country.

Changtai Yangtze River Bridge has set three world firsts. It is not only the world’s first cross-river passage integrating expressways, intercity railways, and first-class highways, but also a cable-stayed bridge with a main channel span of 1,176 meters. The world record for a dual-purpose cable-stayed bridge; the two arch bridges connecting Tianxingzhou and Lu'anzhou on both sides will also become the world's largest road-rail dual-purpose steel truss arch bridge.

Project construction

The Changtai Yangtze River Bridge project puts forward high requirements on high-performance bridge steel. The technical requirements of the full bridge adopt the "standard + α" mode. The performance of the steel needs to meet the technical requirements of "Structural Steel for Bridges" GB/T 714-2015, and at the same time. Meet the technical requirements of the latest edition of "Structural Steel for Railway Bridges" TB/T 3556—2020. At the same time, the mechanical properties such as tensile strength, yield strength, longitudinal and longitudinal properties, and yield ratio have been individually tightened and adjusted. The bridge technology requirements are the highest in the country. Some steel plates in the project require a width of more than 4600 mm, which not only limits the size of the mill's rolling mills, but also increases the difficulty of the uniformity of steel plates produced by the steel mills. At the same time, the high-strength composite panels used in some of the railway bridge decks of this project are the first in China.

After knowing that the project was approved, the Marketing Center (Baosteel International) Hot Plate and Engineering Materials Sales Department cooperated with Baosteel Central Research Institute, Manufacturing Department, Thick Plate Department and Steel Trading Company to form a project public relations team, and visited the Changtai Yangtze River Bridge project as soon as possible Department, promptly recommended Baosteel Co., Ltd. bridge steel quality products to the owners, and provided the owners with multiple bidding model proposals based on past supply experience, which won the owners’ full trust and affirmation. Baosteel Central Research Institute actively visited the project design unit China Railway Bridge Survey and Design Institute. On the basis of full communication, China Railway Bridge Survey and Design Institute agreed to include rolled composite plates in the supply, laying the technical foundation for the winning bid of this project. The Marketing Center (Baosteel International) Steel Trading Company meticulously implemented the bidding work, and adjusted the bidding strategy in time according to competitors during the bidding process. In response to the high technical requirements of the bridge steel required for the project, tight start time, and demanding delivery deadlines, the Manufacturing Department and Heavy Plate Department jointly held project guarantee meetings in Shanghai and Zhanjiang to formulate production processes and invert production according to project requirements. The time node provides a strong guarantee for the supply of the project. In the end, Baosteel Co., Ltd. won the bid for the project in one fell swoop with China Railway Baoqiao with its comprehensive advantages.

Never stopping is the wheel of history. From the Shanghai-Sutong Yangtze River Bridge, which broke many world records, to the Changtai Yangtze River Bridge, which set more world records, the century-old Baowu is helping China’s bridge industry to open a new page, and it will also Will continue to write another glorious century.Editor/Xing Wentao