Sichuan Tibet railway, the trend of the times and the direction of the people

At 17:20 on November 9, 2019, with the completion of the last section of concrete pouring, the three line continuous steel structure bridge with the largest span in the Lalin section of Sichuan Tibet Railway constructed by China Railway 12th Bureau Group Co., Ltd. was officially closed, which is also one of the key and difficult projects of the whole line. It is reported that Bayu bridge is located in the Grand Canyon of the Yarlung Zangbo River. Due to the influence of terrain and climate conditions, strong ultraviolet rays and large temperature difference between day and night, it brings many difficulties to the construction and maintenance of the bridge. It has to be said that it is so difficult and harsh to carry out construction work under such cold and anoxic conditions. However, this difficulty is the "tip of the iceberg" of Sichuan Tibet railway A 6031 a 6031 Sichuan Tibet Railway starts in Chengdu, Sichuan Province, passes through Pujiang, Ya'an, Kangding, Litang, Zuogong, Linzhi and finally reaches Lhasa, the capital of Tibet. Because of its complex terrain and frequent geological disaster environment, railway engineering is very difficult. Compared with the Qinghai Tibet railway, the Sichuan Tibet Railway faces more risk factors. The conditions to be solved are not only permafrost, but also various geological problems such as avalanches, deserts, swamps, karst caves and hidden rivers. Among them, the line "eight rises and eight falls" needs to be built in the most precipitous Hengduan Mountains like a huge "ten ring roller coaster" railway, and the famous Nujiang River 72 turns, In a straight line of 2 kilometers, the altitude drops sharply. To see the crags and crags in the barren mountains above 4400 meters, the altitude drop is 1700 meters. It seems that just after taking the "ten ring roller coaster" and then the "vertical roller coaster", it can be seen that its construction is difficult and its technical difficulty is the most in the world

because of the great significance of the construction of Sichuan Tibet railway, the construction of Sichuan Tibet railway will greatly shorten the distance between the central and western regions, promote the cultural exchange between Tibet and the mainland. More than half of the Han people living in Tibet are Sichuan people, and the two places have a close basis for communication. Once the Sichuan Tibet railway is completed, the economic benefits will be unlimited Only accelerating the pace of the western development, but also promoting the sustainable economic development of Tibet. More importantly, the construction of Sichuan Tibet railway, the promotion of the belt and road construction, and the construction of the land economic and trade channel between China and South Asia also play an irreplaceable role in national defense construction

people are looking forward to one day taking the Sichuan Tibet railway to Dujiangyan to see the crystallization of ancient wisdom; to Hailuogou to see the glacial spectacle under Gongga Mountain; to maoya grassland to see the vast and magnificent prairie and other magnificent scenery At last, the author hopes that when the Sichuan Tibet railway is completed and opened to traffic as soon as possible, all the railway construction workers will witness this historic moment with us through this "roller coaster" railway. Even if the road ahead is full of brambles, we will be able to move forward without a sword. This is the Chinese railway

(Liu Tiange)