On June 25, 2021, the Lhasa-Nyingchi Railway was officially opened for operation, and the Fuxing plateau internal electric dual-source EMU was put into operation simultaneously. Lhasa to Shannan and Nyingchi can be reached in 1 hour 10 minutes and 3 hours 29 minutes at the fastest.

Lalin Railway

The Lalin Railway starts from Lhasa City in the Tibet Autonomous Region, passes through Gongga County, Dranang County, Nedong District, Sangri County, Jiacha County, and Lang County and Milin County of Nyingchi City in Shannan City, and reaches the urban area of Nyingchi with a total length of 435.48 kilometers. Designed at a speed of 160 kilometers per hour, it is a national Class I single-track electrified railway. At the initial stage, 9 stations in Gongga, Zanang, Shannan, Sangri, Jiacha, Langxian, Milin, Gangga and Nyingchi will be opened for passenger and freight transportation. .

According to reports, the Lalin Railway is located in the southeastern Tibet valley between the Gangdise Mountains and the Himalayas on the Qinghai-Tibet Plateau. More than 90% of the lines are above 3000 meters above sea level. It crosses the Yarlung Zangbo River 16 times. The mountains along the line are high and deep, with a relative elevation difference of 2500 meters. , The construction is extremely difficult. Since the start of construction in March 2015, with the support and participation of local party committees and governments and people of all ethnic groups, China National Railway Group has given full play to the advantages of China’s socialist system that can concentrate its efforts on major issues, organized various participating units, and integrated the use of China’s railway construction practices. Experience, concentrate on tackling key engineering problems such as “strong rock burst, high ground temperature, moraine layer, wind-accumulated sand, and large deformation”. 47 tunnels and 121 bridges have been built in a safe and high-quality manner, including the largest buried depth in the country. The Jade Tunnel, the Sangzhuling Tunnel with high ground temperature and the Zangmu Yarlung Zangbo River Bridge, which is the world's largest in terms of altitude and large span.

In the construction of Lalin Railway, the demonstration and leading role of scientific and technological innovation has been fully utilized, the first-time success rate of the project has been effectively improved, the ecological environment along the line has been protected, a number of modern landmark buildings with distinctive humanities have been formed, and a number of permanent buildings have been built at the same time. The combined roads and bridges have promoted the development of local industries and the prosperity of people of all ethnic groups. In order to adapt to the environmental conditions of the operation of the Lalin Railway plateau, the railway department has strengthened the prevention and control measures of geological disasters along the line, established a monitoring and alarm system, perfected the implementation of emergency plans and disposal mechanisms, and comprehensively improved the response to various complex and disastrous climates and safe operation. ability.

Before the opening of operation, China National Railway Group organized relevant units to strictly enforce various regulations and standards, and carried out inspection and acceptance and safety assessment of various professional equipment of Lalin Railway, and carried out track status, bow network performance, train control, communication signal system, etc. Comprehensive optimization has met the requirements for safe and stable operation of the railway, and the conditions for operation are now available.

At the initial stage of operation, the railway department arranged 3 pairs of D-head trains from Lhasa to Linzhi, of which 2 pairs operated during peak passenger flow; 1 pair of D-head trains from Shigatse to Linzhi; 1 pair of express trains from Lhasa to Linzhi Pu.

China National Railway Group took the lead in organizing domestic locomotive and rolling stock scientific research and equipment manufacturing enterprises to form an innovation consortium, and successfully developed the Fuxing plateau internal electric dual-source EMU, which was put into operation at the same time when the Lalin Railway was opened, and historically achieved 31 Fuxing pairs. Full coverage of provinces, regions and cities. The EMU adopts a whole train integrated design, with electric power cars and internal combustion power cars attached to both ends, which can be freely switched between electrified and non-electrified lines, and can be used in connection. There are 12 cars in the group, with first-class, second-class and commercial cars. It has a capacity of 755 people, and innovatively uses a combination of diffusion and distributed continuous oxygen supply to provide passengers with a good riding experience and fully adapt to the high-altitude, continuous long tunnel environment.

The Fuxing plateau internal electric dual-source EMU adopts an integrated design, with electric power vehicles and internal combustion power vehicles attached to both ends, which can be freely switched and connected between electrified and non-electrified lines; innovatively adopts a combination of dispersion and distributed The continuous oxygen supply method provides passengers with a good riding experience and is fully adapted to the environment of high altitude and continuous long tunnels.

The Lalin Railway connects the existing Lari and Qinghai-Tibet Railways. It is also an important part of the Sichuan-Tibet Railway under construction and a common line of the planned Yunnan-Tibet Railway. Its completion and opening to traffic ended the history of no railways in southeastern Tibet, made up for the shortcomings of existing transportation methods that are easily affected by the plateau climate, further improved the regional comprehensive transportation system, and improved the stability and accessibility of transportation. The dream of people of all ethnic groups in Tibet getting on the train to Lhasa has been realized. Editor/He Yuting