Shanghai Chongqi Gongtie Yangtze River Bridge has entered the main construction phase

Chongming District Information Office introduced, on February 13, the piling ship "Haili" 801 started operation under the cooperation of a number of escort ships under the construction of the world's largest span railway and railway dual-purpose ballastless track cable-stayed bridge on the east side of Qiqi River on the north bank of Chongqigang Yangtze River Bridge of Shanghai-Chongqing-Chengdu high-speed railway. With a length of 51.4 meters, a diameter of 2.8 meters and a weight of 78.6 tons, the first steel drum of Pier 4 of the main bridge slowly "sinks" into the bottom of the river, marking that the bridge has officially entered the main construction stage.

Chongqi Gongtie Yangtze River Bridge, as the world's largest span of both railway and railway ballastless track cable-stayed bridge, is a key control project of the whole line of Shanghai-Chongqing-Chengdu high-speed railway. The bridge, with a total length of 4.09 kilometers, spans the northern branch of the Yangtze River and is the main link between Qidong and Shanghai Chongming. Its structure is a double-layer railway bridge with two lines of high-speed rail + two lines of intercity + six lanes of first-class highway layout. It is a steel truss combined girder cable-stayed bridge with a main span of 400 meters, two towers and two cable planes.

According to reports, the bridge Qieast side of the 4# pier main tower foundation bored pile a total of 76 steel drum. The punching area is located in deep overburden layer and special rock and soil layer, which is a river alluvial landform. The water area in which the water flow is fast and the navigation environment is complicated, so it is difficult to punch the steel protective cylinder. In order to ensure the smooth construction of the first permanent steel protective drum of the bridge, Shanghai Chongming Maritime Department and Jiangsu Nantong Maritime Department provided on-site guidance for many times. The project department of China Railway Bridge Bureau planned ahead and organized carefully to implement the construction concept of "standardized construction, get it right the first time" into each process, and formulated relevant emergency plans in view of the difficulties. A comprehensive performance check and hidden danger screening were carried out on the approach equipment to ensure the smooth construction of the underwater main pier pile foundation and create conditions for the comprehensive construction.

The newly built Shanghai-Nanjing to Hefei section of Shanghai-Chongqing-Chengdu high-speed Railway is an important part of the national "eight vertical and eight horizontal" high-speed railway network along the Yangtze River high-speed railway corridor, among which the Chongqi-railway Yangtze River Bridge is a key project of the Shanghai-Nanjing section of Shanghai-Chongqidong high-speed railway from Jiangsu province to Shanghai Chongming. The construction of the project meets the needs of the Belt and Road Initiative and the construction of the Yangtze River Economic Belt. Once completed, the project will be of great significance to promoting trans-river integration, promoting the integrated development of the Yangtze River Delta and the high-quality development of the Yangtze River Economic Belt, building a comprehensive three-dimensional transport corridor along the Yangtze River Economic Belt, improving transport capacity and service quality, and promoting coordinated regional economic and social development. It is of great significance to build a comprehensive multi-dimensional transport corridor along the Yangtze River Economic Belt, improve transport capacity and service quality, and promote coordinated economic and social development among regions.