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拟建的青藏铁路格尔木——拉萨段全长1208公里,其中有560多公里线路通过连续多年冻土区,该区自然地质条件极为复杂,厚层地下冰,热融沉陷、热融滑坍、热融湖(塘)、冰椎、冰丘、沼泽化湿地等不良地质现象广为分布。其中,厚层地下冰对路基工程危害最大。多年冻土地段海拔高度均在4400米以上,该区气压低、空气稀薄,平均气压为560～600毫巴,
The proposed Golmud-Lhasa section of the Qinghai-Tibet Railway, with a total length of 1208 km, of which over 560 km long passes through the continuous permafrost zone, has extremely complicated natural and geological conditions, thick underground ice, thermal and thermal subsidence, thermal slump, Hot melt lake (ponds), ice vertebrates, ice hills, swamp wetlands and other adverse geological phenomena are widely distributed. Among them, the thick underground ice is the most harmful to roadbed engineering. Permafrost above the elevation of 4400 meters above sea level, the area of low pressure, thin air, the average pressure of 560 to 600 mbara,