论文部分内容阅读
为了防治草原公路风吹雪危害,本课题组调查了全国大部分草原牧区公路的雪害状况,通过数量化及风速流场分析,得到如下结论:(1)在草原牧区障碍物距路较近的零路堤、全路堑、迎风半路堑、背风半路堑极易形成公路风吹雪雪害;(2)路旁有障碍物的零路堤的积雪部位主要在障碍物的迎风侧和背风侧,如果离路太近极易造成公路路面积雪;(3)全路堑的积雪部位主要位于背风坡的坡脚和迎风坡的坡脚,且无论路堑走向与风向的夹角如何,都会造成路面积雪,只是积雪量、积雪部位和积雪形态不同;(4)迎风半路堑的积雪主要位于迎风坡的坡脚位置,其严重程度与迎风坡坡度,边坡坡脚距路的远近有关;(5)背风半路堑的积雪主要位于背风坡的坡脚位置,积雪形态以高大的雪檐为主,且坡脚距路越近路面积雪就越严重。
In order to prevent and control the wind and snow hazard of grassland highway, our research group investigated the snow damage of most of the country’s grassland and pastoral roads. Through the quantitative and wind flow field analysis, the following conclusions were obtained: (1) In the pastoral zero Embankment, all the cutting, the wind half-cut, leeward half-cut can easily form a snowstorm on the highway; (2) the snow-covered parts of the road embankment with obstacles on the roadside mainly in the windward and leeward side of the obstacle too Near the extremely easy to cause snow on the road pavement; (3) the snow-cutting parts of the whole cut is mainly located in the slope foot of the leeward slope and slope foot of the windward slope, and regardless of the included angle between the direction of the cut and the wind direction, (4) The snow cover in the windward half-graben is mainly located at the slope foot of the windward slope, and its severity is related to the slope of the windward slope and the distance from the foot of the slope to the slope; 5) Limb lee half of the snow cover is mainly located in the leeward slope of the foot position, the snow form is mainly tall cornices, and the slope of the foot of the road closer to the snow more serious.