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随着在风力侵蚀区交通工程建设的增多,交通线路风力侵蚀问题日益受到关注。通过选取张集铁路,进行路堤、取土场和便道试验,对其输沙率和风速关系、风沙流结构和风蚀运动规律进行分析。结果表明,路堤边坡不同部位输沙率与风速存在明显的幂函数关系;设计高度为3 m路堤的风蚀现象与风速和风向无明显关系,随着风速增大趋势由迎风坡向背风坡移动,设计高度为6 m和9 m的路堤风蚀现象与坡面高度、风速和风向有较明显规律,但风蚀趋势变化不明显;大于6.7 m/s时,便道和取土场不同部位点均发生风蚀现象。以上研究规律可以为工点防护设计以及环境评价工作提供参考。
With the increase of traffic engineering construction in the wind erosion area, the issue of wind erosion on the traffic lines has drawn increasing attention. By selecting the Zhang-Ji railway, embankment, borrow pit and sidewalk test, the relationship between sand transport rate and wind speed, wind-sand flow structure and wind erosion are analyzed. The results show that there is a significant power function relationship between the sand transport rate and the wind speed in different parts of embankment slope. The wind erosion with the design height of 3 m has no obvious relationship with the wind speed and wind direction, and moves from the windward slope to the lee slope as the wind speed increases , The wind erosion phenomenon of the embankments with the design heights of 6 m and 9 m is more obvious than that of the slope height, wind speed and wind direction, but the wind erosion trend does not change obviously; when the water erosion is greater than 6.7 m / s, Wind erosion phenomenon. The above research rules can provide reference for engineering design and environmental assessment.