北疆铁路沿线风沙危害的研究

Blown Sand Harm along North Xinjiang Railway and its Control

北疆铁路沿线存在着严重的风沙危害。在三个典型路段风沙危害有不同的表现形式,北疆铁路沿线风沙危害发生与当地干旱多风的气候条件、铁路沿线下伏含沙地层、铁路施工对地表的破坏以及艾比湖周围沙漠化的发展有关。作者通过实验计算空气动力学粗糙度,比较了三种典型的机械防沙措施的效果,指出了其中存在的不足。并根据研究结果,提出了一个优化的防沙体系方案。

Blown sand activities is threatening north Xinjiang railway. In this article, we first analyzed the cause and mechanism of blown sand harm, and pointed out that the reason of sand harm lies in the vulnerable environment and irrational human activities; then the efficiency of the existing sand control facilities were evaluated by measuring their aerodynamic roughness length; at last an optimized sand control system was proposed.