兰新铁路思甜至了墩段沙害形成原因分析及防治研究

Cause Analysis of Sand Disaster on Sitian-Liaodun Section along Lanzhou-Urimqi Railway and Prevention Research

为解决兰新铁路思甜至了墩段风沙灾害问题,基于现场调研,掌握研究区沿线沙害现状和沙害形成原因,并提出防治措施。沿线风沙危害发生与当地干旱多风的气候条件、铁路沿线松散的路堑边坡、路堑堑顶弃土和路堑内形成弱风区有关。综合考虑工程造价和现场实际情况,研究区铁路防沙设计建议采用固化松散路堑边坡+堑顶弃土构筑挡沙堤+高立式阻沙沙障+大方格阻固沙障相结合的防沙模式,构建立体防沙体系。

In order to solve problems of blown sand disaster on Sitian-Liaodun Section along Lanzhou- Urimqi Railway, this paper focuses on the causes of sand disaster based on field investigation and proposes control measures. Blown sand disaster is contributed by the local climate conditions of drought and frequent wind, the loose cutting slopes along the railway line, the spoil on the top of the road cut and the weak wind area formed within the road cut. Comprehensive consideration of project cost and actual site situation concludes that the combination of blockage and fixation of sand is employed by means of solidifying loose cut slopes, building retaining wall with spoils on the top of the road cut, and constructing high sand barriers and the large pane fixing- sand barriers.