The Third Nanjing Yangtze River Bridge is another river-crossing passage built in Nanjing section of the Yangtze River after the Nanjing Yangtze River Bridge and the Second Nanjing Yangtze River Bridge, with a total length of about 14.89km, of which the river-crossing bridge is 4.744 km long. The main bridge is a cable-stayed bridge with twin towers and steel box girders with a main span of 648 meters. The cable tower is 215m high, and is designed with a steel-concrete tower body. The lower part of the lower beam is a concrete tower, and the upper part is a steel tower. It is the first time in the world that the steel tower column is designed as an arc.
The completion of the third Nanjing Yangtze River Bridge plays a vital role in improving the traffic pattern, promoting the development of the south and north new areas of Nanjing, echoing the development strategy along the Yangtze River, and promoting the common prosperity of Nanjing metropolitan area and the integrated development of the Yangtze River Delta.
In June 2005, the third Nanjing Yangtze River Bridge was officially opened to traffic. Zhan Tianyou, the 3rd Nanjing Yangtze River Bridge and the 7th China Civil Engineering Award in 2008.
geographical position
The third Nanjing Yangtze River Bridge is located at Dashengguan, about 19 km upstream of Nanjing Yangtze River Bridge, and is an important part of the main line of Shanghai-Chengdu National Highway (GZ55). It is about 14.89 km across the banks of the Yangtze River, connecting Nanjing Ring Road in the south and Ninghe Expressway in the north, of which the river-crossing bridge is 4.744 km long. The main bridge is a twin-tower steel box girder cable-stayed bridge with a main span of 648 meters, and the tower is made of steel structure, which is the first cable-stayed bridge with steel tower in China and the first curved steel tower cable-stayed bridge in the world.
The total length of the bridge and connecting line is about 15.6 km, with a total investment of 3.09 billion yuan. The south approach bridge is 680 meters long and the north approach bridge is 2780 meters long. The south bank wiring is 3.083 kilometers long and the north bank wiring is 7.773 kilometers long. The whole line adopts the standard construction of two-way six-lane expressway, with four interchanges. It was completed and opened to traffic in June 2005.
The third Nanjing Yangtze River Bridge is about 350 kilometers away from the mouth of the Yangtze River. The south bank of the project starts from Liucun Interchange on the ring road, and connects the expressway around the city under construction in Nanjing to the east. The end point of the north shore is Zhangdian Interchange of Pukou Ninghe Expressway, and it is connected to Ninghuai Expressway in the north.
Nanjing Third Bridge, Nanjing Second Bridge, Huancheng Road, Puzhu Road and Liu Ning Road constitute the inner ring expressway in Nanjing. Together with Ninghuai Expressway, Ring Expressway under construction and Nanjing Fourth Bridge, Nanjing Outer Ring Expressway will be formed. Integrate Nanjing-Shanghai Expressway, Ninghe Expressway, Nanjing-Hangzhou Expressway, Ninghuai Expressway, Ningbang Expressway and Ningma Expressway.
Construction background
Nanjing Yangtze River Third Bridge is a new achievement of Nanjing Municipal Party Committee and Municipal Government to seize the opportunity to speed up the traffic pattern in Nanjing under the background of Nanjing's great development, and it is also a result of the pilot project along the Yangtze River in Jiangsu Province.
The third Nanjing Yangtze River Bridge is only 19 km away from the Nanjing Yangtze River Bridge.
According to reports, the Third Bridge is an important part of the national trunk line from Shanghai to Chengdu and should be built before the Second Bridge. However, considering the development needs of Baguazhou, the second bridge was built in front of the third bridge in advance. The Nanjing Yangtze River Third Bridge has already started the preliminary planning at the early stage of the second bridge construction.
The preliminary work of Nanjing Yangtze River Third Bridge started on 1998. When Lou Xuequan and his companions participated in the construction of the second bridge, they were also planning the third bridge.
Wu Huanling, deputy commander-in-chief of the Nanjing Third Bridge who was in charge of the preliminary work of the Third Bridge at that time, said that there were no steel tower bridges in China at that time, and 80% of the steel tower bridges in the world were concentrated in Japan. Steel tower bridge can shorten the construction period, reduce the dead weight of the bridge, improve the seismic performance of the structure and increase the safety of the structure.
However, at that time, China had no experience in the design and construction of steel tower bridge, with high technical content, great construction difficulty and predictable pressure.
architectural feature
The construction experience of Nanjing Yangtze River Third Bridge not only contributed a lot to the history of Chinese bridges, but also improved the new level of Chinese bridge construction equipment by using its equipment. In order to ensure the installation of the steel tower crane of the Third Bridge, the Third Bridge Construction Command specially customized two super-large tower cranes from abroad, with a tower height of 252 meters, which is the highest tower crane in the world.
Yin Yang, deputy commander of the Nanjing Third Bridge Construction Command, introduced that the two herringbone steel towers of the Third Bridge are 2 15 meters high, and their main parts are assembled by more than 90 steel sections. The arc design of steel tower column is also adopted for the first time in the world, and its hoisting construction technology is very demanding, so there is no relevant experience at home and abroad to learn from. The weight of a single section of steel tower column is between 130 ~ 180 tons, and the maximum lifting height exceeds 200 meters, and the lifting capacity of corresponding equipment is required to exceed 3000 tons. To this end, the headquarters invited France Botan Company, a "professional household" of international tower crane production, to build two steel giants for Nanjing Third Bridge through international bidding. Hercules is 252 meters tall, with a total structural weight of 900 tons and a maximum lifting capacity of 3,600 tons. Thanks to these two tower cranes, the steel tower of the Third Bridge completed all hoisting tasks in only five months, one year ahead of the construction of ordinary concrete towers.
The world's first crane, which made outstanding contributions to the Third Bridge, was later used by Sutong Bridge. It is said that if the world's first tower crane is adopted, the construction difficulty of the 300-meter-high pylon of Sutong Bridge will be greatly reduced.
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