CCTV News: Chongtai Yangtze River Tunnel is one of the control projects of the Shanghai-Nanjing High-speed Railway, connecting Shanghai Chongming District and Jiangsu Taicang City. On the morning of April 16, the world's largest diameter high-speed rail shield machine "Pilot" successfully excavated to the 2830th ring in the Chongtai Yangtze River Tunnel Project of the Shanghai-Nanjing-Hebei High-speed Railway, with a total of 5,660 meters of excavation and reaching the center of the Yangtze River.
The reporter came to the shield excavation site of the Chongtai Yangtze River Tunnel. The water above his head was the Yangtze River Knife Aquatic Germplasm Resources Protection Area. The "big guy" behind the reporter is the "Pilot" shield machine independently developed by my country. The total length is 148 meters, the total weight is about 4,000 tons, and the diameter of the cutter plate reaches 15.4 meters. It is also the largest high-speed rail shield machine with a diameter of currently. Just now, the pilot was excavated to the 2830th ring.
The Chongtai Yangtze River Tunnel is one of the control projects of the Shanghai-Nanjing Hebei High-speed Railway, connecting Chongming District, Shanghai and Taicang City, Jiangsu Province. The project is located on Chongming Island, a world-class ecological island, and it passes through private houses, embankments, anchorages and aquatic species protection zones. The project construction faces challenges such as settlement control and green treatment of mud and water. According to the staff, in order to reduce the impact of shields crossing the Yangtze River on the ecological environment, 20.56 million yuan was invested to protect the germplasm resources of the Yangtze River's slash aquatic products, and to carry out systematic ecological restoration and resource compensation work mainly based on reproduction and release and vegetation restoration. During the shield excavation process, electric vehicles are used for transportation of equipment to reduce the emission of pollutants and noise such as carbon monoxide and particulate matter.
It is understood that the Shanghai-Nanjing-Hebei High-speed Railway is responsible for the transportation of passenger flows along the river channel, the coastal and part of the Beijing-Shanghai Channel to Shanghai. Among them, the Chongtai Yangtze River Tunnel is 14.25 kilometers long, the shield crossing water section is 11.325 kilometers long, and the designed speed is 350 kilometers per hour. It is the world's highest driving speed underwater tunnel. After completion and operation, it will achieve the feat of high-speed rail crossing the Yangtze River without slowing down. Experts said that after the project is completed and operated, it is expected that Chongming will only take 17 minutes to go to Shanghai Baoshan Station via Taicang, and a new rapid channel will be built between the Shanghai Metropolitan Area, the Nanjing Metropolitan Area and the Hefei Metropolitan Area, which is of great significance to building the "Yangtze River Delta on the track" and promoting the high-quality integrated development of the Yangtze River Delta.
The steel structure of Tianfu Station, the largest high-speed railway station in Sichuan was fully completed
On April 16, the steel structure construction of Tianfu Station, the largest high-speed railway station in Sichuan was fully completed, laying the foundation for the station's scheduled use.
On the morning of the 16th, at the construction site of Tianfu Station, the largest high-speed rail station in Sichuan, the last roof main structure steel truss was hoisted in place, and the steel structure project of Tianfu Station was announced to be completed.
Tianfu Station is the first TOD project in Sichuan Province to integrate the construction of high-speed rail stations and surrounding cities. The entire construction area exceeds 620,000 square meters, and the main body of the station will exceed 120,000 square meters. After completion, Tianfu Station will have 12 platforms, and 22 high-speed rail trains can be parked at the same time during peak hours. The entire station is designed with three floors above ground and two floors underground. It is the largest high-speed rail station in Sichuan Province. The largest high-speed rail station is 32 meters high and more than ten floors high. This designed high-speed space can alleviate the feeling of oppression when crowded people.
But this design curve not only needs to be beautiful, but also needs to consider the safety under extreme conditions, so there is this big guy - "swing column". If extreme weather occurs or earthquakes occur, the swing column will allow the entire ceiling to swing to a certain extent, increasing disaster resistance.
