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沙丘背风侧不同铁路结构形式对风沙环境的适应性分析

王文博 黄宁 顿洪超

王文博, 黄宁, 顿洪超. 沙丘背风侧不同铁路结构形式对风沙环境的适应性分析[J]. 力学学报, 2020, 52(3): 680-688. doi: 10.6052/0459-1879-20-043
引用本文: 王文博, 黄宁, 顿洪超. 沙丘背风侧不同铁路结构形式对风沙环境的适应性分析[J]. 力学学报, 2020, 52(3): 680-688. doi: 10.6052/0459-1879-20-043
Wang Wenbo, Huang Ning, Dun Hongchao. ANALYSIS OF WIND-SAND MOVEMENT OVER SAND DUNE WITH DIFFERENT RAILWAY FORMS DOWNSTREAM[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 680-688. doi: 10.6052/0459-1879-20-043
Citation: Wang Wenbo, Huang Ning, Dun Hongchao. ANALYSIS OF WIND-SAND MOVEMENT OVER SAND DUNE WITH DIFFERENT RAILWAY FORMS DOWNSTREAM[J]. Chinese Journal of Theoretical and Applied Mechanics, 2020, 52(3): 680-688. doi: 10.6052/0459-1879-20-043

沙丘背风侧不同铁路结构形式对风沙环境的适应性分析

doi: 10.6052/0459-1879-20-043
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项目(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)顿洪超,博士后,主要研究方向:风沙物理学,粉尘释放. E-mail:dunhc@lzu.edu.cn

  • 中图分类号: U216.4

ANALYSIS OF WIND-SAND MOVEMENT OVER SAND DUNE WITH DIFFERENT RAILWAY FORMS DOWNSTREAM

  • 摘要: 当铁路穿越大风沙漠地区时,风沙灾害会对铁路工程及其正常运营产生严重威胁,而设计一种合理的铁路结构形式能够减小风沙沉积对铁路工程的危害. 在本文中,以敦煌至格尔木铁路沙山沟段落为研究对象,采用多相流的方法对越过沙丘的风沙运动过程进行数值模拟,分别讨论了风沙运动对位于沙丘背风坡的铁路路基工程和桥梁工程的影响. 主要的模拟结果显示:路基工程明显降低了风速并且将沙丘后的回流区分成了两部分,而桥梁工程的导流效应则压缩了沙丘背风坡的回流区;轨道间的道碴增大了铁路表面的粗糙度,在轨道间有少量沙粒沉积,而路基工程两侧则有大量积沙;铁路表面的积沙量与摩阻风速呈现出非线性关系,随着摩阻风速的增大,路基工程沙粒沉积的增加速度大于风蚀能力的增加速度,而桥梁工程则正好相反. 在防止风沙危害铁路方面,设置桥梁工程明显优于路基工程. 本研究为风沙运动对铁路工程的影响提供了理论支持,也为今后的铁路工程设计提供了新的思路与研究工具.

     

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

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