Sichuan Tibet Railway Report

On November 2, Bayu tunnel of Lhasa Linzhi section of Sichuan Tibet railway was successfully completed. In the process of construction, the highest record of 7015 meters of single head driving of plateau railway tunnel was set. Bayu tunnel is the largest plateau railway tunnel in the world with the strongest rock burst, the longest single head driving distance and the largest buried depth in China. It is called "the tunnel with stones flying like shells" by the builders. The builders have overcome thousands of rock burst threats and have safely run through the whole tunnel.

The obvious terrain height difference, strong plate activity, frequent mountain disasters and fragile ecological environment of

Sichuan and Tibet have brought great challenges. Once the "Heaven Road" Qinghai Tibet railway, today's Sichuan Tibet railway is known as "the most difficult railway to build". It is reported that the total length of the main tunnel of Bayu tunnel is 13073 meters, the total length of the horizontal guide is 9481 meters, the highest altitude is about 3500 meters, the maximum buried depth is 2080 meters, and the highest temperature is about 47 degrees Celsius. 94% of them are located in the rockburst area. The intensity and frequency of rockburst are high. Generally, the duration of rockburst is 2 to 6 hours, lasting for more than a week at most, and even there will be two rockbursts several months later Explosion, which is very rare in the world tunnel construction history. In addition, limited by special geographical conditions, the tunnel can not be set with auxiliary tunnel, only from the two ends of the inlet and outlet of the single head driving. We are not afraid of obstacles, overcome difficulties and move forward step by step to success A 6031 a 6031 foreign countries call us "infrastructure maniacs", which make things impossible for foreigners to accomplish possible again and again. Similarly, China's railway constantly creates miracles and writes brilliance. As an important throat of the Lalin railway, Bayu tunnel takes only 15 minutes for the train to pass through. It is estimated that after the 200 km / h Sichuan Tibet railway is opened to traffic, the train time from Chengdu to Lhasa will be reduced from the original 43 hours to about 13 hours, and the traffic time will be reduced by about one third. The convenient Sichuan Tibet railway will connect Tibet with the Yangtze River economic belt, which will become a convenient land route from China to South Asia. (Li Liuqing)