Fearless difficulties! Another class I high risk tunnel on the Lalin railway has been successfully completed

At 10:16 on the 18th, with a burst of blasting noise, the Lhasa Nyingchi railway was successfully connected to the tunnel. This is the successful completion of another long tunnel with an altitude of more than 3000 meters in the whole line of Lalin railway, marking a breakthrough in the key and difficult projects of the whole line once again. (China Railway, November 19) the

Lalin railway is 435.48 km long, with a design speed of 160 km / h. It is the first electrified railway in Tibet. Lalin railway is not only the railway connecting Lhasa station of Lhasa city and Linzhi station of Bayi District of Linzhi City, but also an important part of Sichuan Tibet railway. Lalin railway goes down the Lhasa River, turns to the East through Gongga, passes Shannan, Lang county and Milin, and crosses the Yarlung Zangbo River to Linzhi station. At the same time, in order to meet the needs of different regions, the line from Lhasa to Linzhi is divided into the north line of high-grade highway in Lalin and the south line of railway in Lalin. The Lalin railway is also the first high mountain railway in the southern valley of Tibet between the Himalayas and the Nianqing Tanggula mountains in human history

therefore, it is very difficult to construct along the way due to the high altitude, extremely bad climate, complex geological structure and other construction problems. Zharou tunnel, located in Milin County, Linzhi City, Tibet Autonomous Region, has an average altitude of 3100 meters, a total length of 4836 meters, a bridge tunnel ratio of more than 75%, a maximum buried depth of about 660 meters, and a blast zone of more than 38.4%. It is one of the six class I high-risk tunnels in 47 tunnels of Lalin railway A 6031 a 6031 although there are many difficulties in the construction of Lalin railway, how can it be difficult for the railway people who are not afraid of hardship and tiredness? It is reported that after 1600 days of construction, on November 18, the Lhasa Linzhi section of Sichuan Tibet railway was connected by a tunnel. The tunnel is the 42nd of 47 tunnels in the Lalin section. As of November this year, 98.8% of the total design mileage has been completed in the construction of Lalin railway tunnel. The completion of the tunnel marks the breakthrough of the key and difficult projects of the whole line again, and lays a solid foundation for the opening of the tunnel in 2021

it is predicted that the completion and opening of Lalin railway in 2021 will play a huge role in promoting the economic and social development along the line. At that time, the Lalin railway will greatly promote the development of tourism in Tibet and the areas along the line. It can also transform the resource advantages of the Tibetan areas along the line into economic advantages, and improve the development level of Tibet faster. At the same time, we can strengthen ties between Tibet and the mainland, strengthen ethnic exchanges and unity. It will also strengthen national defense more effectively

(Wen / Huang Jiawei)