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大风区铁路沿线挡风墙积沙机理及优化措施的风洞实验研究

辛国伟 黄宁 张洁

辛国伟, 黄宁, 张洁. 大风区铁路沿线挡风墙积沙机理及优化措施的风洞实验研究[J]. 力学学报, 2020, 52(3): 635-644. doi: 10.6052/0459-1879-20-045
引用本文: 辛国伟, 黄宁, 张洁. 大风区铁路沿线挡风墙积沙机理及优化措施的风洞实验研究[J]. 力学学报, 2020, 52(3): 635-644. doi: 10.6052/0459-1879-20-045
Xin Guowei, Huang Ning, Zhang Jie. WIND-TUNNEL EXPERIMENT ON SAND DEPOSITION MECHANISM AND OPTIMAL MEASURES OF WIND-BREAK WALL ALONG RAILWAY IN STRONG WIND AREA[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 635-644. doi: 10.6052/0459-1879-20-045
Citation: Xin Guowei, Huang Ning, Zhang Jie. WIND-TUNNEL EXPERIMENT ON SAND DEPOSITION MECHANISM AND OPTIMAL MEASURES OF WIND-BREAK WALL ALONG RAILWAY IN STRONG WIND AREA[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 635-644. doi: 10.6052/0459-1879-20-045

大风区铁路沿线挡风墙积沙机理及优化措施的风洞实验研究

doi: 10.6052/0459-1879-20-045
基金项目: 1)国家重点研究开发项目(2016YFC0500901),国家自然科学基金项目(11772143,41730644)、中国科学院寒区旱区环境与工程研究所科技服务网络规划(HHS-TSS-STS-1504)和中央高校基金(lzujbky-2020-cd06)资助
详细信息
    通讯作者:

    2)张洁,教授,主要研究方向:风沙环境力学,粉尘释放,大气科学. E-mail: zhang-j@lzu.edu.cn

  • 中图分类号: U216.4

WIND-TUNNEL EXPERIMENT ON SAND DEPOSITION MECHANISM AND OPTIMAL MEASURES OF WIND-BREAK WALL ALONG RAILWAY IN STRONG WIND AREA

  • 摘要: 位于兰州至新疆的兰新二线是世界上首条穿越大风区的高速铁路,途径著名的烟墩风区、百里风区、三十里风区及达坂城风区,风区段铁路里程长达 462.4 km,占新疆段线路总长的 65.1${\%}$,大风对铁路的运营、养护和运输造成很大危害. 为了降低大风对通行列车的危害,兰新铁路沿线设置了大量挡风墙. 挡风墙发挥作用的同时,也带来了铁路沿线的积沙问题. 为了解决这一工程实践的现实问题,本文提出了在现有挡风墙背风侧的不同位置处,设立第二道挡墙以减弱铁路积沙的治理思路,并开展了对应条件下对现有单道挡风墙、以及在现有单道挡风墙背风侧坡顶处和坡脚处设置第二道挡墙,共计3种情景的风洞模拟实验,发现设置第二道挡墙后距轨道线路高0.1 m处的沙粒水平速度、数密度、输沙通量及沉积率较无第二道挡墙时明显减少,介于8%$\sim$12${\%}$,51%$\sim$69${\%}$,20%$\sim$73${\%}$以及26%$\sim $38${\%}$,而且在现有单道挡风墙背风侧坡顶部增设第二道挡风墙的效果更好. 因此,本文的研究成果有助于优化大风区已有铁路沿线、城镇等防沙治沙工程措施.

     

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  • 收稿日期:  2020-02-15
  • 刊出日期:  2020-06-10

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