Introduction of Muzhailing Tunnel?

The total length of Muzhailing Tunnel is 17 10 meter, the main line is 9 kilometers, the carriageway is 9 meters wide, and the total investment is nearly1600,000 yuan. Among them, there are 3 medium bridges, 3 small bridges and aqueducts and 29 culverts. The subgrade width of the whole line is12m, the carriageway width is 9m, and the total length is10.72km.. The tunnel is located on the eastern edge of the Qinghai-Tibet Plateau, with an altitude of 32 16m, an annual average temperature of 5.5℃ and a minimum temperature of -34.6℃. The frost-free period of the whole year is only 93 days, which belongs to the cold and humid zone. It is an important part of National Highway 2 12 from Lanzhou to Guanzigou, and it is also an important passage from Gansu and Northwest China to Southwest China. Due to the steep slope, slippery rain and snow, narrow subgrade, poor driving conditions and frequent traffic accidents, the development of regional economy has been seriously restricted.

Muzhailing highway tunnel

On September 16, 2003, Muzhailing Tunnel, one of the key projects of western development, was completed with a cannon at the junction of Zhangxi 'an County and Minxian County in Dingxi area of snowy plateau.

At the beginning of 2002, the project was listed as the key construction project of road network reconstruction in Gansu Province, and was undertaken by the fourth company of China Railway 16th Bureau Group. Various advanced and scientific construction methods were adopted to ensure the excellent quality of the project at one time. It will shorten Panshan highway traffic and pedestrians 10 km, accelerate the pace of people flow, logistics and information flow in Dingxi area, integrate resource advantages, improve road network structure and improve transportation capacity, which will play a very important role in promoting the economic development of Minxian County, which has the reputation of being the hometown of medicinal materials in the world.

Muzhailing Tunnel in lanzhou-chongqing railway

Muzhailing Tunnel is located in Zhangxi 'an County and Minxian County, Dingxi City, Gansu Province, with the left line 19020m and the right line 19080m. It is a double-hole single-line separated extra-long tunnel, which was built by China Railway Tunnel Group Co., Ltd. Muzhailing Tunnel is the second longest tunnel in lanzhou-chongqing railway, second only to the West Qinling Tunnel. Tunnel stratum conditions are very complicated, and it is a very high-risk tunnel determined by the Ministry of Railways. The project started in March 2009 and is scheduled to be completed by the end of 20 16.

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