Xinguanjiao Tunnel, located in Tianjun County, Qinghai Province, is the control project of the second line project of Xige Railway Section of Qinghai-Tibet Railway. Construction started in an all-round way on June 6, 2007, using drilling and blasting method, designed by China Railway First Survey and Design Institute Group.
With a total length of 32.645km, it will be the longest tunnel in China by 20 17, ranking fifth in the world.
Xinguanjiao Tunnel is designed as two parallel single-line tunnels with a design speed of 160km and a distance of 40m between the two lines, both of which are located in a straight line. * * * Inclined shaft 1 1, with a total construction period of 5 years, actually nearly 7 years.
Xinguanjiao Tunnel is the control project of the second double line from Xi (Ning) to Gemu Railway of Qinghai-Tibet Railway. The geological conditions of the construction site are extremely complicated. After the opening of the tunnel, the time for trains to cross Guanjiao Mountain will be shortened by nearly 2 hours, and the capacity of the Qinghai-Tibet Railway will be greatly improved.
Construction significance of Xinguanjiao tunnel;
Xinguanjiao Tunnel makes the length of China Railway Tunnel exceed 30 kilometers for the first time, and it is the first high-altitude long tunnel in the world. The successful construction of Xinguanjiao Tunnel has established the technical system of disaster prevention, evacuation and rescue for high-altitude extra-long tunnels in China, and the innovation of new ventilation and ballast technology has provided a new construction mode for the construction of high-altitude extra-long tunnels.
A series of innovative new ideas and methods are adopted in the design, which overcomes the rare continuous high-pressure water inrush and forms the comprehensive treatment technology of karst fissure water in high-altitude and extra-long tunnels. At the same time, it broke through the previous ventilation concept, created a new technology of energy saving and emission reduction for operating ventilation of extra-long tunnels in high altitude areas with natural ventilation scheme, and achieved a major breakthrough in operating ventilation technology.
On the basis of a lot of scientific research, the research results of disaster prevention and rescue technology, operation ventilation technology and baffle ventilation technology of long inclined shaft in plateau railway tunnel completed by Tieyi Hospital reached the international advanced level, and obtained 4 invention patents, 6 utility model patents and national construction method 1. In addition, the opening of the tunnel will shorten the time for trains to cross Guanjiao Mountain by nearly 2 hours.
Reference to the above content: Baidu Encyclopedia-Xinguanjiao Tunnel