干旱区生态环境知识资源中心(Arid): 沙漠公路风沙土路基风蚀破坏试验研究

Arid

	沙漠公路风沙土路基风蚀破坏试验研究
其他题名	Experimental studies of wind erosion failure of aeolian soils subgrade for desert highway
	李驰; 高瑜
来源期刊	岩土力学
ISSN	1000-7598
出版年	2011
卷号	32 期号:1 页码:33-38
中文摘要	以沙漠公路风沙土路基为研究对象, 通过室内风蚀风洞试验研究路基的风蚀破坏规律, 以及路基不同断面对风沙流运动的影响. 以路基高度、路基边坡坡率和路基宽度作为路基断面主要设计参数, 研究不同路基断面下风沙流扰动、增速、减速、恢复的过程, 以及路基周围风速流场的变化特征, 分析路基病害较未病害时路基周围流场的变化. 试验结果表明: 路基高度和边坡坡率对风沙流运动的影响较大. 随路基高度增加, 路基对风沙流流场扰动增强, 迎风坡坡顶处吹蚀破坏和背风坡坡底处堆蚀破坏越显著, 在确定的路基边坡坡率下, 路基模型高度为250 mm较模型高度为60 mm时, 迎风坡坡顶风速增加1.13倍, 背风坡坡底风速减小2.53倍, 建议沙漠公路路基高度宜小于2.5 m. 进一步, 在确定的路基高度下, 比较不同的边坡坡率对路基沿程风速的影响, 发现当路基边坡坡率为1:1.75时, 路基沿程风速变化不明显, 沙漠公路风沙土路基不宜被风蚀破坏
英文摘要	Wind erosion failure law of aeolian soils subgrade and the influence of the different subgrade design cross-sections on wind-blown sand are studied through interior wind erosion wind tunnel test.The wind-blown sand’s process of disturbance, accelerating,speed-down,and recovery in different subgrade cross-sections are studied;the characteristic of wind-blown sand field around subgrade are summarized for subgrade defect and subgrade non-defect.The influence factor on the wind erosion failure of aeolian soils subgrade is analyzed.The results indicate that the effect of subgrade height and slope gradient on the wind-blown sand field is obvious;while the change of subgrade’s width can’t affect the flow field notably.The disturbance to the flow field enhances with the increase of subgrade’s height,blow erosion on the top of the windward slope is severe;and heap erosion destroy is brought to the bottom of leeward slope.When subgrade model height is 250 mm compared with that of 60 mm,the wind speed on the top of windward slope increase 1.13 times and decrease 2.53 times at bottom of leeward slope for the certain side slope rate.So subgrade height should less than 2.5m to avoid the wind erosion failure of desert highway.Further,the influence of the different side slope rate on wind-blown sand is analyzed for the certain subgrade height.The change of the wind speed is unconspicuous when the side slope gradient is 1:1.75,the wind erosion failure of aeolian soils subgrade is neglectable
中文关键词	环境岩土工程 ; 沙漠公路 ; 风沙流 ; 风蚀 ; 路基断面 ; 室内风蚀风洞试验
英文关键词	geoenvironmental engineering desert highway wind-blown sand wind erosion subgrade sections interior wind erosion wind tunnel test
语种	中文
国家	中国
收录类别	CSCD
WOS类目	CONSTRUCTION BUILDING TECHNOLOGY
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:4128006
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/227305
作者单位	内蒙古工业大学土木工程学院, 呼和浩特, 内蒙古 010051, 中国
推荐引用方式 GB/T 7714	李驰,高瑜. 沙漠公路风沙土路基风蚀破坏试验研究[J],2011,32(1):33-38.
APA	李驰,&高瑜.(2011).沙漠公路风沙土路基风蚀破坏试验研究.岩土力学,32(1),33-38.
MLA	李驰,et al."沙漠公路风沙土路基风蚀破坏试验研究".岩土力学 32.1(2011):33-38.