Tsinghua campus Tunnel of Beijing-Zhangjiakou High-speed Railway ran through in the morning and saw the shield machine! (with site map)
Tsinghua campus Tunnel is the control project of Beijing-Zhangjia high-speed railway, which leaves Beijing North Station and enters tsinghua campus Tunnel. The total length of the tunnel is 6.02km, which goes under Xueyuan South Road, North Third Ring Road, Zhichun Road, North Fourth Ring Road, Chengfu Road, Shuangqing Road, etc. After coming out of the ground, the existing beijing-baotou railway is used to form a double-track subgrade, which can pass through the tunnel in 5 minutes after it is completed and opened to traffic.
"tsinghua campus Tunnel is the only tunnel in the whole line that is constructed by shield method." Zhao Bin, the shield manager of China Railway 14th Bureau, said that the geological conditions of tsinghua campus Tunnel are complicated, with 3 special risk sources and 80 first-class risk sources. At present, it is a high-speed rail single-hole double-track large-diameter high-risk shield tunnel with the most complicated stratum and many important buildings in the urban core area of China. "Specifically, the tsinghua campus Tunnel will cross seven major urban roads and 88 important municipal pipelines, including Xueyuan South Road, North Third Ring Road, North Fourth Ring Road, Zhichun Road, Chengfu Road and Shuangqing Road, and will cross or cross with Metro Lines 10, 12, 13 and 15 for a long distance." Zhao Bin told reporters that the minimum distance between the tunnel and Metro Line 13 is only 3.4 meters.
The reporter saw at the scene that the shield machine that broke ground in the morning was 12.64 meters in diameter and was the largest shield machine in the northern region. "The excavation section of the shield machine in the tsinghua campus tunnel is equivalent to four times that of a common subway tunnel and is higher than a four-story building." Zhao Bin said that in order to commemorate Zhan Tianyou, the designer of the old Beijing-Zhangjia high-speed railway, the project department specially named the shield machine "God Bless".
As the world’s first ballasted track high-speed railway with a design speed of 350 km/h, the Beijing-Zhangjiakou high-speed railway is about 174 km across, leading from Beijing North Station in Xizhimen and passing through Haidian District, Changping District, Yanqing District, Huailai County, Hebei Province and Xuanhua District to Zhangjiakou. There are 10 stations on the whole line, including Beijing North Station, Qinghe Station, Shahe Station, changping station Station and Badaling Great Wall Station in Beijing, and Donghuayuan North Station, Huailai Station, Xiahuayuan North Station, Xuanhua North Station and Zhangjiakou South Station in Zhangjiakou.
According to the Municipal Commission of Housing and Urban-Rural Development, up to now, the subgrade project of Beijing-Zhangjia high-speed railway has been completed 99%, the excavation of the main tunnel project has been completed 94%, and the prefabrication and erection of the bridge substructure and box girder have all been completed. Among them, the Badaling Great Wall Station, Qinghe Station, Kangzhuang Bridge, Nankou Bridge, Xierqi Bridge, Badaling Tunnel, Juyongguan Tunnel, Nankou Tunnel and tsinghua campus Tunnel in Beijing are progressing smoothly as a whole, and the civil construction of Juyongguan Tunnel, Nankou Tunnel and tsinghua campus Tunnel has been completed, and the station construction is being implemented as planned.
According to the plan, the Beijing-Zhangjia high-speed railway will be opened to traffic at the end of next year. In addition, there are two branch lines opened at the same time as the main line of Beijing-Zhangjia high-speed railway, one connecting 53 kilometers from Xiahuayuan North Station to Chongli Prince City Station and the other connecting 9 kilometers to Yanqing Station. In the 2022 Beijing Winter Olympics, these two feeder lines will also become commuter tools for visitors to travel between the two cities.