on March 23, the first steel girder of the main bridge of Hongzhou Bridge in Nanchang, which was constructed by China Railway Bridge Bureau of Nanchang Municipal Public Utilities Group, was erected with the precise hoisting of 208 tons of segmental steel girders in place.
Hongzhou Bridge is designed according to the concept of "one bridge, one scene, each with its own characteristics". The shape of the gate tower adopts the structure of "Chang", which implies prosperity and prosperity. It combines with the symbols of Nanchang to form the shape of the bridge tower, and combines with the curve shape of the eaves of ancient buildings. The character shape of "Chang" highlights the characteristic culture of Nanchang. It will become a landmark building in Nanchang in the future. The main bridge
of Hongzhou Bridge
is 592 meters long. It is a self-anchored suspension bridge with a maximum span of 252 meters and a section width of 38.5 meters. The main bridge is of steel-concrete composite beam structure, which is erected in 33 segments. The first steel girder of the main bridge erected this time is 16 meters long and 33.5 meters wide, and is constructed by floating crane on water. The overall construction scheme of the steel girder incremental launching of the
main bridge is to set up an incremental launching platform and to launch synchronously from west to east at multiple points in one direction. The maximum pushing span is 72 meters, which is in the leading level in China. According to Zuo Shaoqun, the project manager of Hongzhou Bridge of China Railway Bridge Bureau, temporary pier steel pipe pile support and steel beam assembly jacking construction platform are set up on site, and then the floating crane is used to hoist the segment to the set position on the assembly platform, and then welded with the guide beam. When a segment of steel girder is assembled, the whole steel girder shall be pushed from west to east in a one-way and multi-point synchronous manner. After all the steel girders are pushed in place, the steel girder closure section shall be installed.
In order to ensure the smooth erection of the first steel girder of the main bridge, the project team has formulated a safe and reasonable construction plan, refined the division of labor, assigned responsibilities to people, arranged special personnel to inspect the hoisting equipment in advance, and organized technical disclosure. In the process of hoisting, the safety and technical personnel shall watch and control the whole process, the construction personnel shall control the standard, and the assistant management personnel shall organize traffic guidance and safety warning to ensure the safety, orderliness and controllability of the hoisting work. As the ninth Jiang Daqiao across the Ganjiang River in Nanchang City
, Hongzhou Bridge is a key project in Jiangxi Province and Nanchang City. The project was commenced on February 16, 2022. After 13 months of overcoming difficulties, the pile foundation of the bridge has been completed, and 158 pile caps have been completed, with a cumulative completion rate of over 70%; 174 piers and abutments have been completed, with a completion rate of over 60%; 42 bent caps have been completed, with a completion rate of about 40%. T-beam prefabrication and erection, steel beam erection, and the construction of the main tower on the east and west banks are all progressing in an orderly and steady manner, and the project is expected to be completed and opened to traffic in September 2024.
Hongzhou Bridge can connect the East Outer Ring Road to the east and the West Outer Ring Road and Changli Expressway to the west. It is an important part of the passenger and freight traffic fast passage and secondary traffic corridor in the south of the central city of Nanchang. After the completion of the project, it will play an important role in opening up the urban framework, building the skeleton network of the peripheral areas of the city, serving the medium and long-distance rapid transportation links between the peripheral groups of cities such as Jiulong Lake and Nanchang County, as well as the external transportation between the groups, strongly supporting the development strategy of "advancing eastward, expanding westward, extending southward, integrating northward and rejuvenating" of Nanchang City, and promoting the optimization of urban spatial functions and industrial development.
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