crsbg news -pg电子官方

on february 27, the first 718-ton section of the main tower was accurately positioned, marking the world's highest suspension bridge zhangjinggao yangtze river bridge, was successfully lifted and it’s a solid step in the construction of the world's largest span bridge.

the main tower of the zhangjinggao yangtze river bridge is 350 meters high, equivalent to the height of a 125-story building, and will be the world's highest suspension bridge tower when completed. the main tower adopts steel box-concrete-filled steel tube constrained combination system, which is the first use in the world. the main tower consists of upper, middle and lower columns, which are divided into 30 sections. there are 4 steel tube confined concrete column with a diameter of 3.6 meters in the steel box, which are formed as a whole section through the web, transverse partition and steel box, and the steel volume is about 34,000 tons.

the manufacturing precision, deformation control and automatic welding rate of the zhangjinggao yangtze river bridge steel tower require a high level. the main tower consists of 30 segments, and the vertical height of the 350 meter tower allows deviation within 58 mm, only a fist's distance. the vertical deviation of each segment should be controlled within 2 mm, which is equivalent to the allowable deviation value of a 4-story height building is only the size of a grain of rice.

adhering to the concept of standardization, factory-oriented, intelligent, specialized and refined, crsbg is equipped with a series of "intelligent" manufacturing equipment such as air plasma cnc cutting machine, gantry intelligent welding robot system, plate unit cnc correction machine, 3d digital scanning, etc., to comprehensively improve the automation level and welding quality of the main tower manufacturing. at the same time, optimize the overall resources, actively coordinate the organization, and carry out a series of technical process innovation, by improving the assembly process, optimizing the welding sequence, designing special tools and other means, to ensure that the main tower millimeter precision manufacturing.

zhangjinggao yangtze river bridge is currently under construction in the world's largest span bridge, is the "china bridge" for the first time to break the 2,000 meters span mark, the construction process will also achieve six "world’s first", refreshing the six " world's greatest ".