The Liuyuan–Golmud Expressway is located in the extreme arid area inland of the Hexi Corridor and Qaidam Basin. This expressway, particularly its Fushaliang section, is prone to serious blown sand hazards. The causes of these hazards remain unknown, thereby hindering targeted sand prevention and control. The aim of this paper is investigate the mechanism of sand damage in Fushaliang by performing a field observation of the locale and conducting wind tunnel simulation experiments. Results show that the sand-moving wind in Fushaliang dominates in the northwest west (WNW) direction. The wind speed, sand-moving wind frequency, sand drift potential, and maximum possible sand transport quantity in Fushaliang are high during summer and low during winter, and the yearly resultant sand transport dominates in the southeast east (ESE) direction. The wind route in Fushaliang is approximately perpendicular to the dominant wind and sand transport directions. During summer, sand materials are blown by the wind from WNW to ESE, after which they are blocked by the expressway roadbed. An area with high wind speed is observed at the shoulder of the windward roadbed slope that leads to a blown sand flow erosion. Meanwhile, low wind speed areas are observed –5H at the upwind direction of the roadbed and from the shoulder of the leeward slope of the roadbed to the 15H downwind direction. These areas accumulate sand materials at the up- and down-wind directions and then release them to the leeward slope of the roadbed, thereby resulting in blown sand hazards. The findings of this work can guide the prevention and control of sand damage in this section of the expressway.

柳园—格尔木高速公路位于河西走廊和柴达木盆地的内陆极端干旱地区。这条高速公路，特别是其伏沙梁路段，容易发生严重的吹沙危险。这些危害的原因仍然未知，从而阻碍了有针对性的防砂和防控。本文的目的是通过对现场进行现场观察并进行风洞模拟实验，研究伏沙梁的沙尘破坏机理。结果表明，伏沙梁的沙风主要在西北西北方向。伏沙梁的风速，运沙风频率，流沙潜力和最大可能的输沙量在夏季高，冬季低，每年产生的砂向东南方向（ESE）占主导地位。伏沙梁的风路大致垂直于主要的风沙运输方向。在夏季，从WNW到ESE的风将沙土吹走，然后被高速公路的路基阻塞。在迎风路基斜坡的路肩处观察到风速较高的区域，这会导致吹沙流侵蚀。同时，在路基的上风方向以及从路基的背风坡的肩部到下风向15H处观察到低风速区域–5H。这些区域会在上，下风向积聚沙子，然后将它们释放到路基的下风坡，从而导致吹沙危险。这项工作的发现可以指导高速公路这一段的防沙性控制。