Structure introduction of Nanjing Yangtze River Bridge

The Jiangzhong Main Bridge of Nanjing Yangtze River Bridge is a steel truss structure. It has 9 piers and 10 holes, and 10 holes (1 × 128 meters 9 × 160 meters). It is composed of supporting steel truss beams and 3 (3 holes for one) 9-hole continuous steel truss beams with a span of 160m each. The main truss adopts a parallel chord diamond truss with lower stiffening chords, and is erected by the cantilever assembly method.

The rock bed is buried 33 to 47 meters below the river bed of the main bridge. The nine bridge pier foundations are made of heavy concrete caissons, steel caissons plus pipe columns, floating reinforced concrete caissons, and steel sheet pile cofferdam pipe columns. etc. Basics. Nine of the 10-hole steel beams of the main bridge have a span of 160 meters. They are riveted and assembled on site using high-quality alloy steel rods.

1. Highway bridge

The Nanjing Yangtze River Bridge is a double-decker, double-track highway and railway bridge, consisting of a main bridge, north and south bridgeheads and north and south approach bridges. The main bridge is divided into two layers. The upper layer is a highway bridge. The main bridge is 1577 meters long and 4 lanes wide. The roadway is 15 meters wide and can accommodate 4 large cars running in parallel. The sidewalks on both sides are 2.25 meters wide.

2. Railway Bridge

The lower level is a railway bridge, with a total length of 6772 meters and a width of 14 meters. It is laid with double tracks and two trains can run in opposite directions at the same time. The main bridge is 1576 meters long, and the rest are approach bridges. The highway approach bridge is 3012 meters long and 19.5 meters wide.

3. Approach bridge

The approach bridge has 22 distinctive bridge holes. The approach bridge adopts the form of a double-hole double-curved arch bridge with Chinese characteristics, and the plane curve part adopts the "curved bridge" The method is to use straight beams to assemble according to curves instead of directly using curved beams.

4. Bridgehead

The bridgehead building of Nanjing Yangtze River Bridge adopts the design plan designed by Zhong Xunzheng and others from the Department of Architecture of Nanjing Institute of Technology (now Southeast University). There are a pair of bridgeheads in the north and south of the bridge. Composite bridgehead, a pair of large bridgeheads and a pair of small bridgeheads.

5. Bridgehead

The bridgehead is 70 meters high and 11 meters wide. It is beige and stands on both sides of the bridge. The bridge protrudes high from the highway bridge deck, with the top The steel "three red flags" 5 meters high and 8 meters long are in the shape of leaping forward, symbolizing the people's communes, the Great Leap Forward and the general line in the 1950s.

After its completion, the bridgehead with three red flags became popular across the country and was imitated many times. There are elevators in the fort leading to the park under the bridge, the railway bridge (not open to the public), the road bridge and the platform on the top of the fort.

6. Small Bridgehead

The small castle is located 68.7 meters away from the big castle towards the approach bridge. Its structure, appearance and color are similar to those of the big castle, only slightly smaller in size. The part of the small fort protruding from the highway bridge deck is a 5-meter-high gray concrete group statue of "workers, peasants, soldiers, and students". Each has a sculpture of five workers, peasants, and soldiers more than 10 meters high. They represent the five major components of Chinese society at that time, namely workers, peasants, and soldiers. , agriculture, military, learning, and business, with typical Cultural Revolution literary and artistic styles.

7. The part below the bridge deck

In the part below the bridge deck, the words "Long live the great unity of the people of the world" and "The great unity of the people of all ethnic groups in the country" are written on the side of the castle. Long live", and large red slogans such as "The people, and only the people, are the driving force to create world history" and "Our country is a people's democratic dictatorship led by the working class and based on the alliance of workers and peasants" are written on the side of the small fort.

These red slogans were eradicated in the 1980s. In 1999, the bridge management office restored the Nanbao slogans when they renovated the Nanbao to celebrate the 50th anniversary of the founding of the People's Republic of China. ?

8. Bridge piers

The Nanjing Yangtze River Bridge Jiangzheng Bridge has 9 piers and 10 holes. The highest pier is 85 meters high from the foundation to the top, and the bottom area of ??each pier is more than 400 meters. square meters, larger than a basketball court, and the highest pier is 85 meters high from base to top. The distance between piers is 128 meters except for the first hole on the north bank, and the other nine holes are all 160 meters. A giant ship of 10,000 tons can be used under the bridge.

9. Railings

There are 202 cast iron reliefs embedded in the railings on both sides of the main highway bridge, including 100 sunflower hollow reliefs, 96 landscape reliefs, and 6 national emblem reliefs.

Among the 96 landscape reliefs, 20 non-repeating reliefs depict the mountains and rivers of the motherland and praise the great achievements of socialist China at that time. They can be called "New China Red Classics".

10. Street lights

There are 150 pairs of white magnolia-shaped street lights next to the sidewalk, each pair 40 meters apart. At night, 1,048 floodlights on the bridge railings are illuminated, and 540 metal halide lamps on the bridge piers illuminate the river as if it were daytime. In addition, 150 pairs of magnolia lanterns are illuminated on the highway bridge, and 228 on the bridgehead and large sculptures. The sodium lamp makes the bridge look like a string of luminous pearls across the river.

11. I-shaped forts

I-shaped forts are erected on the north and south sides of the bridge. They are used to separate ground roads and approach bridges. They serve as the starting point of the approach bridges of the Yangtze River Bridge and are erected on both sides of the bridge. The I-shaped fort is named after the big "work" on each side of the top, which is red. But over the years, few people noticed it because it was blocked by billboards.

The reason why I-shaped forts were set up, according to archives, was to interpret Article 1 of the Constitution of the People’s Republic of China: The People’s Republic of China is led by the working class, A socialist country under the people's democratic dictatorship based on the alliance of workers and peasants

12. Parks

Under the bridge on the north and south sides of the bridge, there is a bridge park covering an area of ??about 20 hectares, with various plantings There are flowers and trees, and there is an elevator that goes directly to the bridgehead on the bridge deck. Among them, Nanjing Yangtze River Bridge Nanbao Park on the south bank of the bridge also has an exhibition hall to introduce the history of the Yangtze River Bridge.

Extended information:

The symbolic significance of the Nanjing Yangtze River Bridge

The Nanjing Yangtze River Bridge is the first railway in New China designed and constructed by its own strength , highway dual-purpose bridge was designed and built by China and was the largest dual-purpose railway and highway bridge in China at that time. Its completion and opening to traffic has become a transportation artery connecting the north and the south, marking that my country's bridge construction has reached the world's advanced level.

Its completion ushered in a new era of "self-reliance" in building large bridges in China. It was regarded as a "model of self-reliance" and "a great achievement in socialist construction" and was called the "Zhengqi Bridge".

The completion of the Nanjing Yangtze River Bridge has shortened the time for trains to cross the river from 1.5 hours by ferry to 2 minutes. It has quickly become one of the lifebloods of transportation between the north and south of China. It also plays a decisive role in East China, creating direct The economic benefit exceeds 6 billion yuan.

The successful construction of the Nanjing Yangtze River Bridge, as well as the low-alloy bridge steel and deep-water foundation engineering technologies developed by China during the bridge construction process, are milestones in China's bridge construction. Because the quality of the Nanjing Yangtze River Bridge is top-notch, this bridge construction team became famous, and the original dozen or so engineers were frequently hired by various bridge construction engineering departments.

Nanjing is located in the lower reaches of the Yangtze River. The river is wide and the water is fast, and the engineering geological conditions are complex. In 1927, Walter, an American bridge expert, came to Nanjing for on-site inspection and left a message: It is impossible to build a bridge in Nanjing. However, it was in this "impossible" place that the first generation of bridge workers in New China used their ingenuity and wisdom to build an impressive bridge. Prove that American bridge expert Walter is wrong.

Baidu Encyclopedia-Nanjing Yangtze River Bridge