The Chongqing-Wanzhou high-speed railway ushered in a new node, and on January 28, the Ranjiaping Tunnel of the Wanzhou hub of the Chongqing-Wanzhou high-speed railway was successfully completed. This is the first tunnel in the Chongqing section of the Chongqing-Wanzhou high-speed railway to be excavated by mechanical operation, laying a solid foundation for the opening of the entire line of the Chongqing-Wanzhou high-speed railway in 2027.
According to the construction party, China Railway Second Bureau, "the Ranjiaping Tunnel passes under the existing highway and cemetery group and is adjacent to the business line for construction (the minimum net distance from the edge of the Xiaowan Tunnel structure of the existing Zhengyu Railway upward line is about 76m), and it is adjacent to the residential area. The buried depth above the vault is about 24-40m, and there is an existing iron tower at the same time, which is about 26m away from the center line of the tunnel, and the buried depth above the arch is about 42m. In order to reduce the impact on the ground and business line, the Ranjiaping Tunnel cannot carry out blasting and excavation, and can only use inefficient mechanical excavation operations, which is extremely difficult to construct. ”
The Chongqing-Wanzhou high-speed railway leads from Chongqing East Railway Station, a hub in Chongqing, and connects to Wanzhou North Station through Nan'an, Banan, Fuling, Fengdu, and Zhongxian to Wanzhou District, with a new main line length of 25091 kilometers, the ratio of bridges and tunnels is as high as 8677%。After the completion of the Chongqing-Wanzhou high-speed railway, it will become an important part of the national "eight vertical and eight horizontal" high-speed railway main corridors Baohai and Beijing-Kunming corridors, as well as an important part of the auxiliary channels of high-speed railways along the Yangtze River. After the project is completed and opened to traffic, the running time of the railway from the main city of Chongqing to Wanzhou will be shortened to less than 1 hour, and at the same time, the interconnection of the three high-speed railways of the West-Chongqing high-speed railway, the Chengdu-Dawan high-speed railway and the Chongqing-Wanzhou high-speed railway will be realized in the Wanzhou hub, and the Beijing-Tianjin-Hebei urban agglomeration and the Yangtze River Delta urban agglomeration will be connected in "6 hours", and the Guanzhong and Central Plains urban agglomerations will be connected in "3 hours".
Reporter Li Hongmiao, Zhang Bojun).
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