Beijing-Guangzhou High-speed Rail

Essential information：

Beijing-Guangzhou High-Speed Railway, referred to as Beijing-Guangzhou High-speed Railway, also known as Beijing-Guangzhou Passenger Dedicated Line, is an important part of Beijing-Port High-Speed Railway (Beijing-Hong Kong), and an important "one longitudinal" of "eight vertical and eight horizontal" high-speed railway in China's "Medium-and Long-term Railway Network Planning". It has a north-south trend and is known as the longest-running high-speed railway in the world. Road. On June 23, 2005, the construction of Wuguang section of Beijing-Guangzhou high-speed railway was officially started; on October 2008, the construction of Jingshiwu section of Beijing-Guangzhou high-speed railway was started; on December 26, 2009, the Wuguang section of Beijing-Guangzhou high-speed railway was opened and operated with initial speed of 350 km/h; On July 1, 2011, the operating speed of Beijing-Guangzhou high-speed railway in Wuhan-Guangzhou section dropped to 300 km/h; on September 28, 2012, the Beijing-Guangzhou high-speed railway in Zhengzhou-Wuzhou section opened; on December 26, 2012, the Beijing-Guangzhou high-speed railway in Beijing-Zhengzhou section opened, marking the opening of the whole line of Beijing-Guangzhou high-speed railway. Beijing-Guangzhou High-speed Railway from Beijing West Railway Station to Guangzhou South Railway Station has a total length of 2298 kilometers. There are 37 stations with a maximum design speed of 350 kilometers per hour and a running speed of 300 kilometers per hour.

Technical difficulties:

Construction is difficult: The Zhengwu section of Beijing-Guangzhou high-speed railway crosses the Beijing-Hong Kong-Macao Expressway and Shanghai-Hanrong express passenger transport corridor, which makes the construction safety more difficult. Mulan Tunnel is a shallow tunnel with a total length of 4745 meters. It has weak rock mass, developed fissures and fractured rock mass. It is under the gully. Water inrush often occurs during tunnel excavation. The total length of Huanglongsi Tunnel is 8715 meters. The depth of the tunnel is generally 100-200 meters, and the maximum depth is about 335 meters. Surface water system Only in some valleys, there are three NNE and nearly EW streams in the tunnel body. Five large and small faults are mainly developed in the cave body. There are structural breccias in the fault zone, which are not cemented. The water conductivity and water-rich are good. The maximum water inflow is 187 cubic meters per day, and the construction risk is high. High technical standards: Based on the digestion and absorption of other high-speed railway technologies, such as Beijing-Tianjin, Wuguang and so on, this paper initiates the test management technology for comparison of raw materials of CA mortar, masters the construction technology of CA mortar filling and effective control of CA mortar separation, optimizes the design and construction technology of wide and narrow joints, lateral block of Ballastless track, and builds up the world. The first is the construction of CRTS II slab ballastless track in mountainous areas and long tunnels, which indicates that China has mastered a set of key technologies such as the construction of CRTS II slab ballastless track in mountainous areas and large tunnels. There are many professional interfaces: The construction process involves roadbed, bridge and culvert, tunnel, ballastless track, precision measurement, four-power integration, station building construction, customer service information and other specialties, which are highly professional and complicated. The frequent conversion and complex connection between processes and specialties involve the conversion of off-line and track engineering, the conversion of Pre-Station and post-station engineering, the conversion of main body and ancillary supporting engineering, and so on. These transformations involve the coordination between different interfaces to ensure the safe, orderly and smooth connection. Environmental protection requirements are high: New energy-saving and environment-friendly building materials are widely used in the station buildings. All the stations are equipped with columnless awnings, which have good lighting performance, complete and transparent functions. Passengers'access, ticket purchasing, waiting and landing paths are simple and smooth, and they are reasonably connected with highways and other modes of transportation to achieve "zero distance" transfer. A large number of "bridge instead of road" designs have been adopted, with the ratio of line to bridge to tunnel reaching 81%, which is conducive to ensuring line quality and operation safety and saving a lot of land resources.

Value Significance：

Beijing-Guangzhou High-speed Railway has a strong radiation-driven role. It closely links Bohai Rim Economic Circle, Central Plains Urban Group, Guanzhong Urban Group, Wuhan Urban Circle, Changsha-Zhuzhou-Tan Urban Group, Yangtze River Delta Economic Circle, Pearl River Delta Economic Circle and other economic zones, effectively reduces the social time cost, brings great convenience to the flow of personnel, and promotes the area. The coordinated development of regional economy and society plays an important role. Zhou Li, former Director of Science and Technology Department of the Ministry of Railways of the People's Republic of China After the opening of the Beijing-Guangzhou High-speed Railway, which runs through the north and south of China, the existing Beijing-Guangzhou Railway will be divided into passenger and freight lines, thus fundamentally alleviating the tension in the transportation of Beijing-Guangzhou Railway. At the same time, the Pearl River Delta will be more closely linked with the Bohai Rim, the Central Plains Urban Agglomeration and the Wuhan Urban Circle, which are the most active areas in China's economy, so as to accelerate the flow of people, logistics, capital and information.