764/5000 The construction of lalin section of sichuan-tibet railway has made decisive progress: the millin tunnel has been successfully completed

The key control project of the sichuan-tibet railway from Lhasa to nyingchi section, the mirin tunnel, has been successfully completed and is expected to be completed by the end of 2020.

On April 7, surging news reporter from China railway group co., LTD. (hereinafter referred to as the transtition group), on April 7, 2020, in the sichuan-tibet railway to Lhasa Tibet section (hereinafter referred to as the sichuan-tibet railway pull Lin) on the project - millin tunnel success, hidden honk tunnel on the same day, at this point sichuan-tibet railway pull section 47 a 216.5 km tunnel across all Lin, marks a decisive progress was made in sichuan-tibet railway pull Lin period of project construction, lay solid foundation for the segment line was opened to traffic on schedule. This is an important achievement of the railway sector in accelerating the construction of key projects in accordance with the requirements of the CPC central committee and the state council on the "six stability" plan.

Minlin tunnel is located in minlin county, nyingchi city, Tibet autonomous region. It is one of the 6 10,000-meter long tunnels with the greatest construction difficulty, with an average altitude of 3,100 meters, a total length of 11,560 meters, and a maximum burial depth of 1,200 meters. It has been called the "hard bone" and the most dangerous "obstacle" by railway builders. The successful completion of the tunnel has formed a new experience in the construction of railway tunnels under extremely harsh natural conditions, which will provide a very useful reference for the planned construction of the sichuan-tibet railway from ya 'an to nyingchi in terms of technology research and development capacity and engineering construction practice.

The lalin section of the sichuan-tibet railway, the first electrified railway in Tibet autonomous region, is located in the southeast of the qinghai-tibet plateau, one of the areas with the strongest crustal movements in China. The line travels along the yarlung zangbo river suture zone between the gangdisi plate of the qinghai-tibet plateau and the Himalayan plate. More than 90% of the route is located on the plateau over 3,000 meters above sea level. It has crossed the yarlung zangbo river 16 times.

Up to now, 47 tunnels have been completed, 119 Bridges have been built, and 115.11 km of track has been laid. It is expected that the track will be laid by the end of 2020 and the line will be put into operation in 2021. The opening of the lalin section of the sichuan-tibet railway will put an end to the history of no railway in the southeast of Tibet, which is of great significance in promoting poverty alleviation along the railway, promoting tourism development and mineral resources development, and promoting the economic and social development of Tibet.