青藏高原可可西里盐湖溃决对青藏公路的危害分析及防治对策建议

Analysis on the Hazard of Hoh Xil Salt Lake Outburst on the Qinghai-Tibet Plateau to the Qinghai-Tibet Highway and Countermeasures

针对青藏高原可可西里盐湖溢水对下游各类冻土工程的危害特征,重点分析了青藏公路遭受盐湖溢水后可能产生的危害方式和程度。结果表明:青藏公路是现存5类冻土工程中受盐湖溢水影响最严重的冻土工程,极大可能产生桥梁水毁、路基沉陷和路基坍塌等后果。针对上述后果,提出了桥梁新建、路基融沉和坍塌防控以及综合引流疏导等措施建议,为逐步减轻或解决盐湖溃决对青藏公路的危害提供科学参考。

Based on the hazards of the collapse of a salt lake to different kinds of downstream permafrost engineering,the possible hazards modes and severity of the Qinghai-Tibet Highway suffering from the outburst are analyzed.The results show that the Qinghai-Tibet Highway is the most seriously affected by salt lake overflow among the existing 5 types of frozen soil projects,which may result in bridge damage,subgrade subsidence and subgrade collapse.In view of the above consequences,countermeasures such as reconstruction of bridge,prevention of embankment subsidence or collapse,and river diversion are suggested,which provides scientific reference to mitigate or eliminate the possible hazard of salt lake collapse to the Qinghai-Tibet Highway.