Beijing-Zhangzhou High-speed Railway Co-commissioning Trial

Recently, with the departure of the first comprehensive inspection train 55201 from the new Changping Station of Beijing Zhangjiakou high speed railway, Beijing Zhangjiakou high speed railway, constructed by China Railway Construction 14th Bureau, China Railway 18th Bureau and other units, officially started the joint commissioning and joint test, laying a solid foundation for the opening of the whole line in 2020.

Beijing Zhangjiakou high speed railway is the key supporting project of Beijing Winter Olympic Games and the first intelligent high speed railway in China. It starts from Beijing North Station, passes Changping Station, Badaling Great Wall Station, Huailai station, Xiahuayuan station and Xuanhua station, and ends at Zhangjiakou station in Hebei Province. The total length of the main line is 174 km, and the maximum design speed is 350 km. After the opening and operation, it only takes one hour from Beijing to Zhangjiakou and Chongli. The main line of section 4 of Beijing Zhangjiakou high speed railway contracted by the 18th Railway Bureau of

is located in Yanqing District of Beijing and Huailai County of Hebei Province, with a total length of 19.12 kilometers, including two control projects - donghuayuan tunnel and Kangzhuang viaduct super major bridge. Qinghuayuan tunnel constructed by China Railway 14th Bureau Co., Ltd. is the only tunnel in the whole line constructed by shield method. The excavation diameter is 12.64m, and the section is 4 times of the common subway tunnel. During the construction, the builders always adhere to the construction concept of "excellent project, intelligent Jingzhang", scientifically organize the construction, optimize the construction process, adhere to scientific and technological innovation, and ensure the smooth completion of the construction task.