干旱区生态环境知识资源中心(Arid): Investigations into the law of sand particle accumulation over railway subgrade with wind-break wall

Arid

DOI	10.1140/epje/i2019-11910-0
	Investigations into the law of sand particle accumulation over railway subgrade with wind-break wall
	Huang, Ning; Gong, Kang; Xu, Bin; Zhao, Jian; Dun, Hongchao; He, Wei; Xin, Guowei
通讯作者	Huang, N (corresponding author), Lanzhou Univ, Key Lab Mech Disaster & Environm Western China, Minist Educ China, Lanzhou 730000, Peoples R China. ; Huang, N (corresponding author), Lanzhou Univ, Sch Civil Engn & Mech, Dept Mech, Lanzhou 730000, Peoples R China.
来源期刊	EUROPEAN PHYSICAL JOURNAL E
ISSN	1292-8941
EISSN	1292-895X
出版年	2019
卷号	42 期号:11
英文摘要	Windbreak wall over railway subgrades is an effective and widely used measure to reduce the impact of high-speed wind in northwest China and central Asia. For the railway crossing sandy/Gobi desert, there exists serious sand accumulation over subgrade behind windbreak walls, causing great harm to the normal railway operation. So far, many measures have been tried to prevent sand accumulation. However, due to lack of understanding on causes of sand accumulation, they are often ineffective. To explore the characteristics of wind-blown sand flow around railway subgrades and the causes of sand accumulation, we set up a turbulent flow-sand particle-terrain coupling model and calculated sand particles' motion features around a typical windbreak wall in Lanxin railway line using the Lagrangian particle-tracing model. The results show that in sandy desert, although inflow sand particles are difficult to fly over windbreak wall, due to presence of a large reflux zone behind the windbreak wall where reverse wind-blown sand flow is generated, sand particles are blown up and rolled back to the subgrade under the effect of vertical wind velocity and reflux. By contrast, in the Gobi desert, sand particles are much easier to fly over windbreak wall and possess different motion features under different wind speeds. To solve the problem of sand accumulation on railway subgrade, we should comprehensively consider both wind speed and underlying conditions and then take appropriate measures.
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000511611600003
WOS关键词	SALTATION
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Physics, Applied ; Polymer Science
WOS研究方向	Chemistry ; Materials Science ; Physics ; Polymer Science
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/369793
作者单位	[Huang, Ning; Gong, Kang; Xu, Bin; Dun, Hongchao; He, Wei; Xin, Guowei] Lanzhou Univ, Key Lab Mech Disaster & Environm Western China, Minist Educ China, Lanzhou 730000, Peoples R China; [Huang, Ning; Gong, Kang; Xu, Bin; Dun, Hongchao; He, Wei; Xin, Guowei] Lanzhou Univ, Sch Civil Engn & Mech, Dept Mech, Lanzhou 730000, Peoples R China; [Zhao, Jian] Northwest Inst Nucl Technol, Xian 710024, Peoples R China
推荐引用方式 GB/T 7714	Huang, Ning,Gong, Kang,Xu, Bin,et al. Investigations into the law of sand particle accumulation over railway subgrade with wind-break wall[J]. 兰州大学,2019,42(11).
APA	Huang, Ning.,Gong, Kang.,Xu, Bin.,Zhao, Jian.,Dun, Hongchao.,...&Xin, Guowei.(2019).Investigations into the law of sand particle accumulation over railway subgrade with wind-break wall.EUROPEAN PHYSICAL JOURNAL E,42(11).
MLA	Huang, Ning,et al."Investigations into the law of sand particle accumulation over railway subgrade with wind-break wall".EUROPEAN PHYSICAL JOURNAL E 42.11(2019).