Introduction to Jiujiang Yangtze River Bridge?

The Jiujiang Yangtze River Bridge is located on the wide Yangtze River between Xunyang District, Jiujiang City, Jiangxi Province and Huangmei County, Huanggang City, Hubei Province. It is China's largest highway and railway bridge on the Yangtze River in the mid-1990s. The bridge is an important bridge across the Yangtze River between the Beijing-Kowloon Line of China's North-South Railway and the G105 National Highway.

The completion of the Jiujiang Yangtze River Bridge is another new milestone in the history of bridge construction in China, following the Wuhan Yangtze River Bridge and the Nanjing Yangtze River Bridge. The total length of the bridge is 7,675 meters.

The Jiujiang Yangtze River Bridge is the eighth bridge built on the Yangtze River in China. Before the Wuhu Yangtze River Bridge was opened to traffic in 2000, the Jiujiang Yangtze River Bridge had been the longest and largest railway and highway bridge in China. . The Jiujiang Yangtze River Bridge was completed on January 16, 1993. It is the "natural thoroughfare" of the Beijing-Kowloon Railway and the Hejiu-Kowloon Railway. It is a double-decker, double-track railway and highway bridge.

The Jiujiang Yangtze River Bridge is not only China, but also the longest steel truss bridge for both railway and highway use in the world. It is not only the main artery of transportation between the north and south of China, but also the most eye-catching and famous tourist attraction in Jiujiang City. Attractions.

Composition

The Jiujiang Yangtze River Bridge is a double-decker, double-track railway and highway bridge, consisting of a main bridge and highway and railway approach bridges on the north and south sides.

Building structure

Among them, the main bridge on the river is 1806 meters long, with 10 piers, 11-hole steel beams, and ordinary steel trusses with a length and span of 160 meters. The main channel is It has a three-hole rigid truss and a flexible arch, with a truss height of 16 meters and a span of 180 meters. The maximum span of the middle hole is 216 meters and the maximum height is 32 meters. Made of 15-manganese barium vanadium nitrogen high-strength low-alloy steel, the maximum thickness of the steel plate is 56 mm, and the steel beam members are riveted with high-strength bolts with a diameter of 27 mm.

The main bridge highway is on the upper level. Outside the scope of the three major arches, the driving lane is 14m wide, and there are 2m wide sidewalks on both sides. In the three major arch parts, the driving lane is 11m, and there are 3.75m motorized sidewalks outside the arches. Driveway and 1m wide sidewalk.

The railway is on the lower level, and the distance between the two lines is 4.2m. The railway is medium-live load (the prestressed box girder is checked to be medium-26); the highway is designed according to steam-20, and the load is -100 and checked; the crowd is 3.5KN/m2. The navigation clearance height is 24.0m, the clear width is 160.0m, and it is arranged according to 3 holes. The earthquake fortification is based on the design intensity of 7°.

The main bridge steel beam has 11 holes, and all steel beams are bolted welding structures. The total length of the main bridge is 1806.712m, with 10 piers in the middle of the river and one abutment on each side of the river. The south bank of the railway approach bridge is 1428.444m; the north bank is 4440.934m. The total length of the railway part is 7676.09m. The approach bridges all adopt 40m ballastless and pillow-free prestressed concrete simply supported box girders. 2 box beams per hole. The south bank approach bridge of the highway is 1347.02m long, the north bank approach bridge is 1306.389m long, and the highway approach bridge is 4460.122m long. They are all 40m prestressed concrete T-beams with 8 pieces per hole.

Importance

The Jiujiang Yangtze River Bridge was surveyed and designed by the Bridge Engineering Bureau of the Ministry of Railways in December 1973.

The Jiujiang Yangtze River Bridge is the eighth bridge built on the Yangtze River in China after the Wuhan Yangtze River Bridge. It is also the longest and largest railway and highway bridge in China.

Whether it is the bridge’s design, construction technology, or the use of new building materials, it reflects China’s most advanced bridge construction level to date. The entire bridge has a novel design, beautiful shape, unique craftsmanship and majesty. The bridge's railway approach adopts ballastless and sleeper-free prestressed box girders, which is the first time in the history of bridge construction in China. The main river channel has a large span of 216 meters, ranking first among bridges in the country.

The Jiujiang Yangtze River Bridge is the "natural chasm thoroughfare" between the Beijing-Kowloon Railway and the Hejiu-Kowloon Railway. It is a double-decker, double-track railway and highway bridge.

The Jiujiang Bridge is not only the longest steel truss bridge in China, but also in the world. It is not only the main artery of transportation between the north and south of China, but also the most eye-catching new tourist attraction in Jiujiang.

In 1992, the Jiujiang Highway Bridge was officially completed and opened to traffic, and in 1995, the Jiujiang Railway Bridge was completed.

After the entire line of the bridge is opened to traffic, it will become the hub of the Beijing-Kowloon Railway. It will have important strategic significance for strengthening transportation between north and south China and promoting economic construction, cultural exchanges and tourism in east China and central and south China.

The new 15 manganese barium nitrogen steel type tested for the first time in China was first used on this bridge.

The steel, cement, wood and other construction materials used in this bridge set a record in the history of bridge construction in China.

The distance from the top of the Jiujiang Bridge pier to the lowest bottom of the foundation is 64 meters, which is equivalent to a 22-story building. From the steel beam vault to the lowest base of the foundation, it is 132 meters high, which is equivalent to a 45-story high-rise building.

The geological conditions of Jiujiang waters are complex, the water is deep and the currents are rapid, making construction difficult. The construction unit adopted a series of new technologies and processes such as double-walled steel cofferdams, mud jacket sinking, and air curtains in the basic project to ensure the quality of the project and was highly praised by the famous bridge expert Mao Yisheng.

The first "double-walled steel cofferdam large-diameter drilling foundation construction method";

The first time to use the "thixotropic mud jacket" and "air curtain" construction technology for sinking depth The 50m main bridge and approach bridge caisson foundations;

The trial production of a 2.5m diameter reverse circulation rotary drilling rig was successful and was used for the first time in bridge construction in my country;

The main bridge rigid beam adopts 15MnVNg A new type of low-alloy high-strength steel, and a bolted welded structure instead of a riveted structure;

For the first time, a double-layer sling frame is used with a full extension arm to install a 180m steel truss beam;

For the first time Adopting 216m long-span mid-span closing and flexible arch closing technology;

For the first time in China, a new "mass-tuned damper" (TMD) is used to suppress vibration on the booms of the three major arches;

Using a self-designed and manufactured bridge-erecting machine with a lifting capacity of 300t, the railway box girder with a span of 40m is erected, which is the first of its kind in China.

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