干旱区生态环境知识资源中心(Arid): 不同坡角公路路基流场的风洞实验

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	不同坡角公路路基流场的风洞实验
其他题名	Wind Tunnel Test on Flow Field of Highway Subgrade with Different Slope Angles
	鱼燕萍 1; 肖建华 2; 屈建军2 ; 魏明年 3; 潘多明 3; 洪雪峰 3; 田永祯 4; 李芳 2
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2018
卷号	38 期号:3 页码:464-472
中文摘要	根据内蒙古S315一级公路黑风口路段风沙危害现状,基于风洞模拟实验,采用毕托管测定不同坡角路基模型断面的风速,通过对流场分布、风速廓线及风速减弱率的分析探讨沙漠公路风沙危害的形成机理。结果表明:坡角对路基两侧的积沙范围和风蚀强度有重要影响。风速一定时,坡角越大,路基两侧积沙范围越大,与之对应的防护范围也应加大。路基坡角一定时,路基背风侧积沙范围随风速增大整体可能呈扩大趋势,坡角越大,扩大趋势越不明显,导致大量沙粒堆积在背风坡脚附近,这就需在坡角较大的公路背风侧多设置几道阻沙栅栏和固沙方格来降低风速、防治沙害。风沙流对迎风坡脚和迎风坡肩的风蚀作用最强,在实际应用中,应重点对这两个部位进行工程砌护,以防路基塌陷造成交通事故威胁公路安全运营。
英文摘要	Based on the status quo of wind-sand disaster along the Heifengkou section of the S315 highway in Inner Mongolia,China,this paper measured the flow field variations of the highway subgrade with different slope angles by Pitot tube.Furthermore,the paper also discussed the formation mechanism of the disaster on desert highway by analyzing the flow field distribution,wind velocity profile and wind speed reduction rate. The results indicate that slope angles have an important influence on the range of sand accumulation area on both sides of the subgrade and the erosion intensity on subgrade.Under a certain wind velocity,the larger the slope angle is,the more broadly the scope of sand accumulation on both sides of the subgrade turns,then the corresponding protection scope tends to be increased.When the slope angle of the subgrade is constant,the range of sand accumulation on the leeward side of subgrade may increase with the increase of wind speed,and the expansion trend becomes less apparent as the slope angle(34°and40°)becomes larger consequently,resulting in a large amount of sand accumulates near the foot of the larger leeward slope,which needs to set a few more sand-blocking fence and sand-fixing grid on leeward side of the subgrade with larger slope angle,used to reduce wind speed and control sand.The wind erosion effect on the foot and shoulder of the windward slope is the strongest among all measuring points,so in order to prevent the subgrade collapse,the foot and shoulder of the windward slope should be focused on building protective engineering.
中文关键词	公路路基 ; 风洞模拟 ; 坡角 ; 流场 ; 风速廓线
英文关键词	highway subgrade wind tunnel simulation slope angle flow field wind speed profile
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENVIRONMENTAL SCIENCES
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:6242654
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238760
作者单位	1.中国科学院西北生态环境资源研究院;;中国科学院大学, 中国科学院敦煌戈壁荒漠生态与环境研究站;;, 兰州;;, 甘肃;;北京 730000;;100049, 中国; 2.中国科学院西北生态环境资源研究院, 中国科学院敦煌戈壁荒漠生态与环境研究站, 兰州, 甘肃 730000, 中国; 3.阿拉善盟公路管理局, 阿拉善, 内蒙古 750306, 中国; 4.阿拉善盟林业治沙研究所, 阿拉善, 内蒙古 750306, 中国
推荐引用方式 GB/T 7714	鱼燕萍,肖建华,屈建军,等. 不同坡角公路路基流场的风洞实验[J]. 中国科学院西北生态环境资源研究院,2018,38(3):464-472.
APA	鱼燕萍.,肖建华.,屈建军.,魏明年.,潘多明.,...&李芳.(2018).不同坡角公路路基流场的风洞实验.中国沙漠,38(3),464-472.
MLA	鱼燕萍,et al."不同坡角公路路基流场的风洞实验".中国沙漠 38.3(2018):464-472.