Qingshui river bridge is located in Hoh Xil No Man's Land (Hoh Xil Nature Reserve) at an altitude of more than 4,500 meters, with a total length of 1 1.7 km. It is the longest "bridge instead of road" bridge on the Qinghai-Tibet railway line, the key control project of the whole Qinghai-Tibet railway construction, and the longest railway bridge on plateau frozen soil in the world.

One hundred thousand road builders spent five years building it. Qingshui river bridge has two functions: frozen soil tunnel and wildlife passage. One of the main purposes of building this bridge is to provide a passage for wild animals to cross the Qinghai-Tibet Railway, which is known as the "environmental protection bridge". In spring and summer, Tibetan antelopes migrating in groups can cross the bridge.

Geographical environment characteristics

Qingshui river bridge, like a beautiful rainbow, flies under the Kunlun Snow Mountain at the edge of the Hoh Xil National Nature Reserve with an average elevation of more than 4,600 meters. Here, Hoh Xil is cold and anoxic, with sparse vegetation and fragile ecology. At the same time, it is located in the plateau frozen soil area, with a frozen soil thickness of more than 20 meters and high ice content, which adds a lot of difficulties to the construction of the Qinghai-Tibet Railway. In order to solve the construction problems in plateau permafrost regions and protect nature reserves, experts in the survey and design of Qinghai-Tibet Railway adopted the measure of "replacing roads with bridges". "Replacing roads with bridges" has solved the problem of subgrade stability in permafrost regions on the plateau. At the same time, the 1300-odd bridge opening between the bridge piers also provides free migration channels for wild animals such as Tibetan antelopes.

make history

The seasonal temperature difference in Qingshuihe area is obvious, with the highest temperature reaching 38℃ in summer and the lowest temperature reaching MINUS 40℃ in winter. Under such climatic conditions, hot melt lakes, underground rivers and frozen balls will appear in permafrost regions. In addition to hot-melt lakes and ponds visible on the surface, when the temperature rises in summer and the frozen soil melts, an underground river will be formed between 20 meters and 30 meters underground; In winter, hot melt lakes and underground rivers will form frozen balls protruding from the surface due to the sudden drop of temperature. If the frozen soil problem is not handled well, the railway will become a bumpy washboard road, leaving hidden dangers for operation. Due to the bad weather conditions, turtle lines appear on individual piers due to the cold weather. In order to ensure the quality of piers, the headquarters of China Railway 12th Bureau bombed three such piers.

Last year1October 29th 10, the main project of qingshui river bridge was completed. Under the Dragon Bridge, there are more than 1300 bridge opening between piers for the free migration of wild animals such as Tibetan antelopes. Now, the railway track has been successfully laid and passed through this bridge. In the mysterious and beautiful no man's land of Hoh Xil, the Qingshuihe Railway Bridge has become a charming landscape.

Tibetan antelope watch qingshui river bridge.

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