The most eye-catching railway project in 2020, the Sichuan-Tibet Railway, started construction in November. This indicates that the construction of the Yalin Section of the Sichuan-Tibet Railway has entered the project implementation stage. The Yalin section of the Sichuan-Tibet Railway has a planned construction period of 3,651 days. The construction will start on November 8, 2020, and will be completed on November 9, 2030. It will be the most difficult project in China and the world in the next ten years. ! Being able to participate in the construction of the Sichuan-Tibet Railway is a manifestation of the strength of the construction enterprise. The Sejila Mountain Tunnel, which was first started in the Yalin Section, was constructed by the 14th Hydropower Bureau and the China Railway Tunnel Bureau.

Sejila Mountain is 4,728 meters above sea level. It is the boundary between the eastern and central western parts of Nyingchi County, Tibet, and the watershed between the Niyang River Basin and the Palong Zangbo River. The Sejila Mountain Tunnel, with a total length of 37.9 kilometers, is a high mountain and deep valley landform with a maximum buried depth of 1406M. It is a famous landmark on the Sichuan-Tibet line. The Sejila Mountain Tunnel will surpass the current longest railway tunnel in my country, the Qinghai-Tibet Railway Xinguanjiao Tunnel (32 kilometers in total length) and the longest railway tunnel under construction in my country, the Darui Railway Gaoligongshan Tunnel (34.538 kilometers in total length), and become China The longest railway tunnel.

At present, Wuxin Tunnel has installed multiple wet spraying machines and arch installation vehicles to assist the construction of the Sejila Mountain Tunnel on the Sichuan-Tibet Railway.

The Wuxin arch installation vehicle greatly reduces the labor intensity of the workers and improves the work efficiency. The operating platform only needs two operators to work, and the rest of the personnel work on the ground. Compared with the manual stand, all work on the simple platform. Tunnel installation of arch frame installation vehicles can reduce personnel safety risks by 80%. In the working environment of high cold and hypoxia, the effect is more prominent!

Based on the rich construction experience accumulated in the past 10 years, combined with technical exchanges and field investigations with the construction party, Wuxin Tunnel has tailored a set of construction solutions for the prototype tunnel, and has fully completed the long-term battle against the alpine climate. ready!Editor/Xing Wentao