典型文献
Numerical simulation on flow field,wind erosion and sand sedimentation patterns over railway subgrades
文献摘要：
The railway subgrades in the sandy areas act as an obstacle interfering wind-blown sand,causing sand erosion and sedimentation,which can disrupt the safe and stable operation of the railway system.Most previous studies mainly focus on the flow field around railway subgrades,however,the real erosion and sedimentation patterns are rarely studied.This study aims to analyze the erosion and sand sedimentation patterns of wind-blown sand over the subgrades with different heights and steel rails using the ratio of the wall shear stress to the critical value of erosion shear stress.Results show that wind erosion near the top of the upwind slope of the embankment and the shoulder on the upwind side are more severe,and the severity increases with an increase in the height of the embankment.With the increase of wind velocity,sand sedimentation both on the windward and leeside of the subgrade decreases and wind erosion by reverse flow occur.This study indicates that railways in sandy areas should be constructed with a moderate subgrade height(4 m).
文献关键词：
中图分类号：
作者姓名：
ZHANG Kai;ZHAO Li-ming;ZHANG Hai-long;GUO Ao-jun;YANG Bo;LI Sheng
作者机构：
College of Civil Engineering,Lanzhou Jiao tong University,Lanzhou 730000,China;Key Laboratory of Desert and Desertification,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
文献出处：
引用格式：
[1]ZHANG Kai;ZHAO Li-ming;ZHANG Hai-long;GUO Ao-jun;YANG Bo;LI Sheng-.Numerical simulation on flow field,wind erosion and sand sedimentation patterns over railway subgrades)[J].山地科学学报（英文版）,2022(10):2968-2986
A类：
subgrades,leeside
B类：
Numerical,simulation,flow,field,erosion,sedimentation,patterns,over,sandy,areas,act,obstacle,interfering,blown,causing,which,can,disrupt,safe,stable,operation,system,Most,previous,studies,mainly,focus,around,however,real,rarely,studied,This,study,aims,analyze,different,heights,steel,rails,wall,shear,stress,critical,value,Results,show,that,near,top,upwind,slope,embankment,shoulder,more,severe,severity,increases,With,velocity,both,windward,decreases,by,reverse,occur,indicates,railways,be,constructed,moderate
AB值：
0.426771
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