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路堑坡面粗糙程度是影响路堑植被生态恢复设计的重要因素之一。该文给出了坡面粗糙度的定义,提出了坡面轮廓线伸长率法、粗糙元平均高度法、平台与坡面水平投影面积比法3种评价方法,并用3种方法分别对规则台阶型路堑坡面、由倾角不同的倾斜面构成的路堑坡面、由凹凸不平的弧面构成的路堑坡面进行粗糙度评价,分析评价方法的评价效果与优缺点。结果表明:粗糙元平均高度法对于3类路堑坡面的粗糙度评价均适用。
Roughness of cutting slope is one of the important factors that affect the design of ecological restoration of road cutting vegetation. In this paper, the definition of slope roughness is given. Three methods are proposed: the slope contour line elongation method, the roughness average height method, and the platform and slope horizontal projection area ratio method. A step-type cutting slope, a cutting slope composed of inclined faces with different inclination angles, and a roughness evaluation of a cutting slope formed by uneven curved surfaces, and the evaluation effect and advantages and disadvantages of the method are analyzed. The results show that the roughness average roughness method is suitable for the roughness evaluation of three kinds of cutting slope.