风沙流对青藏铁路路基影响的研究

针对青藏铁路沙害问题,通过对青藏铁路路基进行观察研究,分析风沙流对路基产生的影响,结果表明:路基的路肩部位风蚀现象明显而坡脚处积沙现象明显;由于背风侧存在涡旋气流,导致背风侧积沙量比迎风侧积沙量少;青藏铁路轨道结构的沙埋现象并不发生在风力最强的时候,而是在弱风季节及多风向季节。

Study on the influence of wind-blown sand on QINGHAI - TIBET railway subgrade

According to the problem of sand hazard in Qinghai-Tibet Railway,through the observation and study of Qinghai-Tibet railway subgrade, analyzinge the influence of sand flow on the roadbed,the results show that the wind erosion phenomenon of the roadside of the subgrade is obvious and the sand at slope foot is obvious. Because of the existence of vortex airflow on the leeward side,the amount of accumulated sand in the leeward side is less than that in the windward side.The sand burial phenomenon of the Qinghai-Tibet railway track structure does not occur when the wind is the strongest,but in the weak wind season and the windy season.