中国沙漠 ›› 2020, Vol. 40 ›› Issue (6): 22-32.DOI: 10.7522/j.issn.1000-694X.2020.00064

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周琪智1(), 赵洋1,2, 高广磊1,2(), 丁国栋1,2, 张英1   

  1. 1.北京林业大学,水土保持学院/水土保持国家林业和草原局重点实验室,北京 100083
    2.北京林业大学,宁夏盐池毛乌素沙地生态系统国家定位观测研究站,北京 100083
  • 收稿日期:2020-03-13 修回日期:2020-06-07 出版日期:2020-12-09 发布日期:2020-12-09
  • 通讯作者: 高广磊
  • 作者简介:高广磊(E-mail:
  • 基金资助:

Numerical simulation on wind-sand two-phase dynamic characteristic of sand-blocking fences in the Cuona Lake section of the Qinghai-Tibet Railway

Qizhi Zhou1(), Yang Zhao1,2, Guanglei Gao1,2(), Guodong Ding1,2, Ying Zhang1   

  1. 1.School of Soil and Water Conservation Key Laboratory of State Forestry and Grassland Administration on Soil and Water Conservation,Beijing Forestry University,Beijing 100083,China
    2.Yanchi Ecology Research Station of the Mu Us Desert,Beijing Forestry University,Beijing 100083,China
  • Received:2020-03-13 Revised:2020-06-07 Online:2020-12-09 Published:2020-12-09
  • Contact: Guanglei Gao



关键词: 风沙灾害, 计算流体力学, 防护体系, 涡旋作用


The Cuona Lake section of the Qinghai-Tibet Railway is seriously affected by wind-sand disasters. Therefore, scientific assessment and systematic optimization of the protection system are of important significance to provide a firm basis for the safe operation of the Qinghai-Tibet Railway. Based on the field investigation and computational fluid dynamics, the wind-sand two-phase flow around sand-blocking fences was simulated using the Eulerian Model. The results indicated that: (1) The effective protection area was 65.34% without sediment deposition behind the fences. With the deposition, the protective benefits gradually diminish after the deposit location antedisplacement. (2) The flow field was divided into 7 regions, and the sediments deposited in the dissipation and vortex effect area. (3) The sand particles began to deposit within 1-1.5 times of the fence’s height affecting by vortex effect. Furthermore, the accumulative deposition after the second fence was larger than the first one. (4) A new sand-blocking fence was proposed characterized by the slant upper structure and microporous bottom. This fence moved the deposition location backward for 1.47 times than the original fence and increased 1.32 times for the effective protection distance. The vorticity is closely related to the sand-blocking fence structure. The subgrade is at a high risk of sand burial due to the energy consumption and sediment deposition around the fence. This study provides a theoretical basis and scientific support for the railway protection system against wind-sand disasters.

Key words: wind-sand disaster, computational fluid dynamics, protection system, vortex effect