The Qinghai-Tibet Railway, often referred to as the Qingzang Railway, is an extraordinary engineering feat that connects Xining in Qinghai Province with Lhasa, the capital of the Tibet Autonomous Region (TAR), in China. It is famous for being the highest railway in the world.
Route and Key Stations:
The railway spans approximately 1,956 kilometers (1,215 miles). While there are numerous stations along the route, only a few are major stops:
- Xining Train Station (Qinghai Province): The eastern starting point of the railway.
- Golmud Train Station (Qinghai Province): This city marked the end of the first phase of construction (completed in 1984). The second, more challenging high-altitude section begins here.
- Tanggula Railway Station: Located at an elevation of 5,068 meters (16,627 feet), it is the highest railway station in the world. The railway itself reaches its highest point at the Tanggula Pass, at 5,072 meters (16,640 feet) above sea level.
- Amdo Train Station
- Nagqu Train Station
- Damxung Train Station
- Lhasa Train Station (Tibet Autonomous Region): The western terminus of the railway.
The journey from Xining to Lhasa typically takes around 20-21 hours.
History and Construction:
The ambitious project was built in two main phases:
- Xining to Golmud (815 km): Construction began in 1958 and this section was completed and opened in 1984.
- Golmud to Lhasa (1,142 km): This section, which presented the most significant engineering challenges due to the high-altitude plateau, began construction in 2001 and was officially opened to traffic on July 1, 2006.
The entire project cost over 30 billion Yuan and is considered a national symbol of technological prowess.
Engineering Challenges and Solutions:
The construction of the Qinghai-Tibet Railway overcame what were once thought to be insurmountable obstacles in one of the world’s most extreme environments:
- Permafrost (Frozen Ground): Approximately 550 kilometers (340 miles) of the railway crosses permafrost, which is prone to thawing and freezing, leading to ground instability. Solutions included:
- Cooling Embankments: Using coarse rock fills and specialized heat pipes to dissipate heat in winter and keep the permafrost frozen.
- Elevated Tracks and Bridges: Over 675 bridges, totaling 160 km (99 mi), were built to elevate the tracks above the permafrost, allowing air circulation to keep the ground cool and minimizing direct heat transfer. The Fenghuoshan Tunnel (4,905m above sea level) is the highest tunnel built on permafrost.
- High Altitude and Oxygen Deficiency: About 85% of the railway is over 4,000 meters (13,123 feet) above sea level, where oxygen levels are significantly lower than at sea level.
- Worker Safety: Comprehensive medical support, including 115 medical facilities and 17 oxygen-making stations, ensured that no deaths from altitude sickness occurred among the construction workers.
- Passenger Comfort: All trains are specially designed with an automatic oxygen supply system that regulates oxygen levels and air pressure within the carriages. Individual oxygen ports are also available for passengers.
- Fragile Ecosystem: The railway passes through sensitive ecosystems, including the Hoh Xil National Nature Reserve, home to endangered species like the Tibetan antelope.
- Environmental Protection: One billion yuan was dedicated to environmental protection measures. The route was carefully planned to avoid sensitive areas, and 33 dedicated wildlife passages (including bridges and underpasses) were constructed to allow animals to migrate safely. Strict waste management and re-vegetation efforts were also implemented.
Significance and Impact:
- Economic Development: The railway has significantly boosted economic development in the Qinghai-Tibet Plateau by facilitating the transport of goods, supporting local industries, and creating jobs.
- Tourism: It has made Tibet more accessible to tourists, offering a unique and scenic way to experience the high-altitude landscapes, distinct culture, and religious sites.
- Connectivity and Integration: The railway ended Tibet’s isolation in terms of rail transport, drastically reducing travel times and strengthening connections between Tibet and the rest of China. It is viewed as a symbol of China’s technological prowess and commitment to developing its western regions.
Extensions:
The Qinghai-Tibet Railway has seen extensions that further expand the rail network in Tibet:
- Lhasa-Shigatse Railway: Opened in August 2014, connecting Lhasa with Tibet’s second-largest city, Shigatse. This line is also considered part of the future Xinjiang-Tibet Railway.
- Lhasa-Nyingchi Railway: Opened in 2021, connecting Lhasa with Nyingchi in eastern Tibet. This is an important segment of the planned Sichuan-Tibet Railway.
Further extensions are envisioned, including linking Shigatse towards the China-Nepal and China-India borders.
