青藏铁路是世界上海拔最高、线路最长的高原铁路。唐古拉山上铁路最高海拔 5 0 72米 ,40 0 0米以上的地段有 960千米 ,连续多年冻土层 5 5 0千米以上 ,是我国实施西部大开发战略中的四大工程中最艰巨的工程之一。青藏高原上修铁路 ,地质条件复杂、工程难度大、环保要求高。因此 Qinghai-Tibet Railway is the highest altitude railway in the world with the longest line in the world. The highest altitude of Tanggulashan Railroad is 5 0 72 meters above sea level, 960 km above 40 000 km and more than 500 000 km above the permafrost. This is the most arduous task among the four major projects in the strategy of large-scale development of the western region of our country One of the projects. Qinghai-Tibet Plateau to repair the railway, the geological conditions are complex, the project is difficult, environmental requirements. therefore