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Introduction of Jiujiang Yangtze River Second Bridge?

Second Jiujiang Yangtze River Bridge, namely Jiujiang Yangtze River Highway Bridge and Jiujiang New Yangtze River Bridge. Located at the junction of Jiujiang County, Jiujiang City, Jiangxi Province (south bank of the Yangtze River) and Xiaochi Town, Huangmei County, Huanggang City, Hubei Province (north bank of the Yangtze River), it crosses the Yangtze River and is located 1.8 kilometers upstream of Jiujiang Yangtze River Bridge. It is an important channel connecting Jiangxi and Hubei, and it is also an important cross-river channel of national expressway (G7 Fuyin Expressway).

the route starts about 2km north of Shahejie Town, Jiujiang County, Jiujiang City, Jiangxi Province, connects with Changjiu Expressway, and ends in the south of Longgan Lake Bridge of Huangxiao Expressway in Xiaochi Town, Huangmei County, Huanggang City, Hubei Province.

Jiujiang Yangtze River Highway Bridge is one of the 7 highway passages across the Yangtze River determined by the National Development and Reform Commission in July, 24. It is the key project of the "five vertical and seven horizontal" national trunk line-the Beijing-Fuzhou line, an important part of the Fuzhou-Yinchuan main line in the "7918" national highway network planning, and the first cross-Yangtze River highway bridge funded and built by Jiangxi Province.

the second Jiujiang Yangtze river bridge project includes 11.474km connecting line of fuyin expressway in Jiangxi, 5.53km connecting line of river-crossing bridge and 8.189km connecting line in Hubei, with a total construction mileage (total length) of 25.193km.

the second Jiujiang Yangtze river bridge is built according to the standard of two-way six-lane expressway. It is a cable-stayed bridge with twin towers and unilateral mixed beams, with a main span of 818 meters, a main bridge deck width of 38.9 meters (including wind nozzles) and a bridge deck width of 33.5 meters for auxiliary holes and approach bridges, ranking "the seventh in the world, the fourth in the country and the first in Jiangxi" for similar bridges built and under construction.

the bridge is mainly composed of three parts: the south bank approach project, the river-crossing bridge project and the north bank approach project. Among them, the river-crossing bridge and the south bank approach road project are invested and constructed by Jiangxi Province; The 8.19-kilometer north bank approach road project is invested and constructed by Hubei Province.

the second Jiujiang Yangtze river bridge started in September 29 and was officially opened to traffic on October 28th, 213.

Building data

The second Jiujiang Yangtze River Bridge is designed with asymmetric mixed beams, with one pier built in the water and the other pier built on the Yangtze River levee. The pier of the North Main Tower, built in the river, consists of 43 bored piles, which is the largest pier in the middle and upper reaches of the Yangtze River, with a designed anti-collision capacity of 3,3 tons. The main tower of the bridge is more than 24 meters high, equivalent to 8 stories high; The total length of the bridge is 25.19km, in which the main bridge is about 5.58km long, the subgrade is 33.5 m wide, the main deck is 38.9m wide, the connecting line is about 19.323km long, the main tower is more than 24 meters high, and the main span is 818 meters, ranking the sixth in the world for cable-stayed bridges (Sutong Bridge is 188 meters, Stonecutters Bridge is 118 meters, Erdong Yangtze River Highway Bridge is 926 meters, and Duoduoluo Bridge is 89 meters). RBQF-2 type unit multi-directional displacement bridge expansion device is selected.

Bridge structure

The main bridge is a cable-stayed bridge with double towers and one side mixed beam. Interchanges are set at Qilihu, Jiujiang Jiangxi, Fenlu and Xiaochi, and the project is jointly built by Jiangxi and Hubei provinces. The bridge has dual functions as a city bridge and a transit bridge. It adopts the Class I standard of two-way six-lane expressway, with a design speed of 1 kilometers per hour and a design reference period of 1 years. It can withstand the catastrophic flood once in 3 years.

Construction process

The Second Jiujiang Yangtze River Bridge started construction in September 29, which is an important part of the main line from Fuzhou to Yinchuan in the national highway network planning. It starts at Qilihu section of Nanjiu Expressway in Jiangxi Province and ends at the north side of Xiaochi Toll Station of Huangxiao Expressway in Hubei Province. It is an important channel connecting Jiangxi and Hubei, and an important river-crossing bridge of ——G7 Fuyin Expressway, with a total length of 25.19 kilometers.

Since the two main towers in the south and north of Jiujiang Yangtze River Bridge were capped on April 28th, 212, the construction of the bridge has been transferred to the installation of stay cables and steel box girders, and the construction of super-wide box girders. It is reported that on November 1th and 11th this year, the south tower and the north tower of Jiujiang Yangtze River Second Bridge were hoisted for two consecutive days respectively, and the hoisting of steel box girder was successfully completed. On December 8th, the 56th steel box girder of the deck project of the Second Yangtze River Bridge in Jiujiang was successfully hoisted, which marked the complete hoisting of the steel box girder of the deck project. At present, the main span of the bridge has been closed.

The difficult problem in the construction of steel bridge deck pavement is to ensure the bonding between steel plate and epoxy asphalt mixture. The solution is to spread a waterproof bonding layer on the steel plate. The spreading conditions are harsh, and the steel plate must be absolutely dry and clean before spreading. At the same time, it is required that no moisture can enter the epoxy asphalt mixture during pavement construction. In order to ensure the paving quality, all construction workers are distributed with sweat-absorbing towels and other protective measures, and all other parts of the body are wrapped up to ensure that sweat does not drip onto the bridge deck.

The steel deck of Jiujiang Yangtze River Second Bridge is the first steel deck paved with epoxy asphalt in Jiangxi Province. The paved part is 1,141m long, with an area of 36,5m2, and the total paving thickness is 5.5cm The construction is divided into two layers: the bottom layer and the upper layer. Due to the particularity of epoxy asphalt construction, the steel deck of the bridge will be paved in ten strips, with six bottom layers and four upper layers, which will take 18 working days. It is expected to be completed on August 2, 213, and it will be open to traffic after 3-45 days of maintenance.

the second Jiujiang Yangtze river bridge was completed and officially opened to traffic on October 28th, 213, and it has become a major inter-provincial channel running through the southeast coast and the central and western regions of China.

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