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On October 31, the “two tunnels and one bridge” of the Ya’an-Nyingchi section of the Sichuan-Tibet railway were announced on the Beijing Construction Project Transaction Information Network. This indicates that the construction of the Sichuan-Tibet railway is about to enter the project implementation stage. The construction tender notice shows thatThe project is scheduled to begin on November 10, 2020, with a construction period of 10 years and completion by the end of 2030.
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On September 30 this year, the National Development and Reform Commission officially approved the Ya’an-Nyingchi stretch of the Sichuan-Tibet Railway. The new main line was 1,011 kilometers long, with 26 stations, 885 kilometers of temporary construction roads, 2,000 kilometers of power lines and operating guarantees from Chengdu and Linzhi. Base, etc.
The railway grade is grade I, the number of main lines is double, and the design speed is 120-200 kilometers per hour.
The total estimated investment of the project is approximately 319.8 billion yuan, including 6.7 billion yuan for land acquisition and demolition, all funded by the state.
The new section of the Sichuan-Tibet railway from Ya’an to Linzhi is located in the Sichuan Province and the Tibet Autonomous Region, starting from the city of Ya’an to the east, passing through Tianquan, Luding, Kangding, Yajiang and Batang west, crossing the Jinsha River into the Tibet Autonomous Region and then passing the Jue, Qamdo, Bomi tribute to Nyingchi, connecting with the Nyingchi station on the Lhasa-Nyingchi section of the Sichuan-Tibet railway under construction
The Sichuan-Tibet Railway connects Chengdu, Sichuan and Lhasa, Tibet. It is the second railway artery to Tibet after the Qinghai-Tibet railway (and the Dian-Tibet highway). After the entire line is finished and open to trafficThe train travel time from Chengdu to Lhasa will be reduced from 36 hours to about 12 hours.
The Sichuan-Tibet Railway is divided into four construction sections. The Chengdu to Ya’an section was opened for operation on December 28, 2018, and the Lhasa to Linzhi section is being laid smoothly and will open in late 2021. Only the most difficult section remains from Ya’an to Linzhi. Start.
As an arduous super railway project that has never been seen in the history of mankind, the Yalin section of the Sichuan-Tibet railway will pass through the Sichuan Basin, the mountainous valley area of western Sichuan, the mountainous plain area western Sichuan, the Hengduan mountainous area in southeastern Tibet and the valley floor area of southern Tibet. Sites, environmental protection, bridges and tunnels face enormous challenges.
The tunnels of the entire line represent up to 84%. The total length of the tunnel is 843 kilometers, which is more than the total length of the high-speed railway from Beijing to Zhengzhou. Among them, there are 6 extra-long tunnels that exceed 30 kilometers. The Yigong Tunnel on the Ranwu-Tongmai section is even more amazing. 54 kilometers, while the longest railway tunnel in China is currently 32 kilometers, and at the same time, the cumulative ascent height is more than 16,000 meters, which is equivalent to two Mount Everest.
The bridges will also be spectacular. Among them, the Dadu River Suspension Railway Bridge has a single span over 1,000 meters, which is the longest single span railway bridge in China. It is said that there is a station on the bridge, and the bridge deck of the Nu River will be 700 meters from the bottom of the Nu River. The top of the Shanghai Tower is 70 meters high.
