兰新铁路十三间房段的戈壁风沙流特征分析  

Analysis of the Characteristics of Gobi Sand-driving wind in Shisanjianfang Section of Lanzhou-Xinjiang Railway

作　　者：李凯崇 蒋富强 薛春晓 杨印海 葛盛昌 

机构地区：[1]中铁西北科学研究院有限公司,兰州730000 [2]乌鲁木齐铁路局,乌鲁木齐830014

出　　处：《铁道工程学报》2010年第3期15-18,共4页Journal of Railway Engineering Society

基　　金：科技部科研院所专项资金项目(NCSTE-2007-JKZX-209)

摘　　要：研究目的:通过对兰新铁路"百里风区"风沙成因进行分析,研究戈壁砾漠地区风沙流密度沿高度变化的特点,不同高度风沙流密度与风速的关系及大风携沙的粒径分布特征。研究结论:戈壁地区大风携沙主要集中在3 m以下,约占总携沙量的87%左右;在同一高度条件下,风沙流密度随着风速的增加显现e的指数增加;而当风速条件一致时,风沙流密度随着高度的增加显现下降趋势。集沙颗粒分析则指出:在不大于3 m的高度范围内百里风区的风沙流运动形式是以跃移为主;超过3 m以后,则以悬移为主。Research purposes： By analysis of the forming reasons for wind-blown sand in ＂100 kilometers wind area＂ along the Lanzhou-Xinjiang Railway,this paper researches the change characteristics of the density of the sand-driving wind with the height change,the relation between the density of wind-blown sand at the different heights and wind velocity,and the particle size distribution regulation of the wind blown sand in Gobi area.Research conclusions：The wind blown sand was mainly concentrated in the space of lower than 3m in Gobi area and it was up to almost 87% of total sand volume.The density of wind-driving sand increased with the increase of wind velocity at the same height.The density of wind-blown sand decreased with the raise of height at the fixed wind velocity.The analysis result of sand particle size showed in the ＂100 kilometers wind area＂,the main movement form of wind blown sand in the space of lower than 3m was in leaping movement,and the main movement form of wind blown sand in the space of higher than 3m was in suspending movement.

关 键 词：风沙流密度 戈壁 风沙运动 粒度高度分异 输沙率 

分 类 号：P694[天文地球—地质学]