According to the latest news from "Nanjing Construction," the construction of the Shangyuanmen River Crossing Channel in Nanjing is advancing at full speed. The first phase of the Jiangnan working shaft and open-cut tunnel, including the retaining structure, main structure, and pile foundation, has been completed. Foundation pit excavation is scheduled to start early next month!

Currently, the retaining structure, main structure, and pile foundation of the first phase of the Jiangnan working shaft and open-cut tunnel have all been completed, marking a phased achievement in the project. At present, the construction focus has shifted to the crown beam and support construction. According to the plan, this section is expected to officially start foundation pit excavation early next month, laying a solid foundation for subsequent shield tunneling.

As a core project connecting the three major hubs of Nanjing North Station, Nanjing Station, and Nanjing South Station, the Shangyuanmen River Crossing Channel has a total length of approximately 20.4 kilometers, including a tunnel section of about 14 kilometers. It is designed as a single-tube, double-track high-speed railway tunnel. This channel is Nanjing's first high-speed railway river crossing tunnel and will feature the technical characteristics of being the "longest, with the highest water pressure, and the deepest burial depth," setting multiple national records for high-speed railway river crossing tunnels and becoming a key project to connect Nanjing's north-south high-speed railway network across the Yangtze River.

According to reports, the large-diameter slurry shield machine customized for the project, with an excavation diameter of 13.72 meters, has reached 60% manufacturing progress. It is expected to roll off the production line in mid-July this year and start tunneling in September. This shield machine will be equipped with advanced technologies such as intelligent construction and intelligent transportation to complete the tunneling task with millimeter-level precision when crossing complex environments such as subway lines and the Yangtze River bed, ultimately achieving precise connection and in-situ disassembly at the river bottom.

The project is being constructed simultaneously in the Jiangnan and Jiangbei sections. According to previous news, the foundation pit retaining structure of the Jiangbei shield launching section is nearly half completed. According to the construction plan, the shield machine is expected to officially enter the site in the second half of the year to start the core tunnel excavation.

Once completed, the Shangyuanmen River Crossing Channel will create a high-standard river crossing between Nanjing North Station and Nanjing Station, undertaking the passenger transport task across the river for lines such as the Ninghuai Intercity Railway, Shanghai-Chongqing-Chengdu High-Speed Railway, Shanghai-Nanjing Intercity Railway, and the planned Ningxuan Intercity Railway. This will not only effectively break the bottleneck of railway river crossings within the Nanjing hub but also help connect the "three major passenger stations" of Nanjing Station, Nanjing South Station, and Nanjing North Station along a single line, further improving Nanjing's "米"-shaped high-speed railway network.

It is worth noting that after the Ninghuai Intercity Railway is introduced into Nanjing Station via the Shangyuanmen River Crossing Channel, it can future connect to Nanjing South Station through the planned Ningxuan Railway and link with the Ning'an Intercity Railway and Ninghang Intercity Railway, forming a longitudinal passenger transport corridor in Nanjing that connects Nanjing Station and enabling Nanjing Station to operate intercity trains in both north and south directions.

Some images and text sources: Nanjing Construction, Nanjing Daily