Bridge construction of Nanjing Yangtze River Bridge

Nanjing Yangtze River Bridge is a super-large bridge with both railway and highway. The railway bridge is 6772 meters long and the highway bridge is 4589 meters long. Under the bridge, ships of 10,000 tons can pass. Nanjing Yangtze River Bridge is the third bridge across the Yangtze River after Wuhan Yangtze River Bridge and Chongqing Baishatuo Yangtze River Bridge, and it is also the largest of the three bridges. The bridge and railway bridge will formally connect the two railway lines, namely, Jinpu and Shanghai-Nanjing, which can directly go from Beijing to Shanghai. Since then, beijing-shanghai railway's connection has not been blocked by the Yangtze River. Among them, the main bridge on the river1577m, and the rest are approach bridges, which is the largest in China.

The main bridge of Nanjing Yangtze River Bridge in the middle of the river is a steel truss beam structure with 9 piers 10 holes and 10 holes (1 ×128m+9×160m), that is,1hole. The bedrock is buried 33 ~ 47 meters below the river bed of the main bridge, and the foundations of nine piers are heavy concrete caissons, steel caissons with pipe columns, floating reinforced concrete caissons and steel sheet pile cofferdam pipe columns. 9 main bridge 10 hole reinforcement beams, with a span of160m, are assembled by riveting high-quality alloy steel bars on site. Highway Bridge Nanjing Yangtze River Bridge is a double-deck two-lane highway-railway bridge, which consists of a main bridge, a north-south bridgehead and a north-south approach bridge. The main bridge is divided into upper and lower floors, and the upper floor is a highway bridge. The length of the main bridge is1577m, the width is four lanes, and the width of the carriageway is15m, which can accommodate four carts in parallel at the same time, and the sidewalks on both sides are 2.25m wide. The lower layer of the railway bridge is a railway bridge, with a total length of 6772 meters and a width of 14 meters. Double track laying, two trains can leave at the same time. Main bridge1576m, the rest are approach bridges. The highway approach bridge is 3012m long and 9.5m wide. There are 22 distinctive bridge opening on the approach bridge. The approach bridge is in the form of a double-hole hyperbolic arch bridge with China characteristics, and the plane curve part adopts the method of "curved bridge under construction", that is, the straight beam is assembled according to the curve, rather than the curved beam directly. The bridgehead of Nanjing Yangtze River Bridge was designed by Zhong Xunzheng from the Department of Architecture of Nanjing Institute of Technology (now Southeast University). There are a pair of compound bridgehead, a pair of bridgehead and a pair of small bridgehead in the north and south of the bridge. The tower of Qiaotou Pagoda is 70m high, 1 1m wide, beige, and located on both sides of the bridge. The great pagoda stands high above the bridge deck, and the steel "three red flags" with a height of 5 meters and a length of 8 meters at the top are in a leap shape, symbolizing the people's commune, the Great Leap Forward and the general line of the 1950s. After the completion of the bridgehead with three red flags, it swept the country and was imitated many times. There are elevators leading to the park under the bridge, railway bridges (closed to the public), highway bridges and platforms at the top of the fort. The small bridgehead is located 68.7 meters from Dabao to the approach bridge. Its structure, appearance and color are similar to those of Dabao, but its volume is slightly smaller. The part of Bao Xiao protruding from the highway bridge deck is a 5-meter-high gray concrete group portrait of "workers, peasants and soldiers". Each group portrait has sculptures of five workers, peasants and soldiers, which was the five major components of China society at that time, namely, industry, agriculture, soldiers, academics and businessmen, with a typical literary style of the Cultural Revolution. The part below the bridge deck is below the bridge deck. On the side of the Great Fort, it says "Long live the great unity of the people all over the world" and "Long live the great unity of the people of all ethnic groups in China". On one side of the small fort, there are red slogans such as "The people, only the people, are the driving force to create world history" and "China is a country of people's democratic dictatorship based on the alliance of workers and peasants led by the working class". These red slogans were eradicated in 1980s. When the Bridge Management Office renovated Nanpu for the 50th anniversary of the founding of the People's Republic of China, 1999 restored Nanpu slogans. Zheng Jiang Bridge of Nanjing Yangtze River Bridge has 9 piers with 10 hole. The tallest pier is 85 meters high from the foundation to the top, and the bottom area of each pier is more than 400 square meters, which is bigger than a basketball court. The highest pier is 85 meters high from the foundation to the top. The pier spacing is128m except for the first hole on the north bank, and the other 9 holes are160m. It is feasible to have a 10,000-ton ship under the bridge. There are 202 cast iron reliefs embedded in the railings on both sides of the main bridge of the railing highway, including hollow sunflower reliefs 100, 96 landscape reliefs and 6 national emblem reliefs. Among the 96 landscape reliefs, there are 20 non-repetitive reliefs, all depicting the landscapes of the motherland and praising the great achievements of socialist China at that time, which can be called "New China Red Classics". There are 150 pairs of magnolia-shaped street lamps beside the street lamp sidewalk, each pair is 40 meters apart. At night, the floodlights of 1048 on the bridge railing are put together, 540 metal halogen lamps on the pier illuminate the river as day, 150 pairs of magnolia lamps on the highway bridge are in full bloom, and 228 sodium lamps and large sculptures at the bridge head make the bridge cross the river like a string of night pearls. Under the bridge on the north and south sides of Park Bridge, there is a bridge park with an area of about 20 hectares, planted with various flowers and trees, and there is an elevator on the bridge deck to reach the bridge head. Among them, Nanbao Park of Nanjing Yangtze River Bridge on the south bank of the bridge also has an exhibition hall to introduce the history of the Yangtze River Bridge.