基于分形理论的沥青路面纹理特征与抗滑性能关系

舒春建¹,胡玉梅²

1.中交第一公路勘察设计研究院有限公司,陕西 西安  710075；

2.西北工业大学自动化学院,陕西 西安  710072

摘要：为提高沥青路面的抗滑性能，根据新疆某公路工程项目已铺筑沥青路面的实体照片和实测模向力系数，运用数字图像处理技术和分形理论研究沥青路面纹理分形维数与抗滑性能的关系，并通过室内试验探讨沥青路面纹理分形维数随车辆荷载作用次数的变化规律。结果表明：随沥青路面横向力系数的增大，路面纹理分形维数呈增大趋势；随荷载作用次数的增加，分形维数总体呈下降趋势，且在沥青路面投入使用初期下降趋势较为明显，抗滑性能降低较快,后减小趋势变慢。

关键词：沥青路面纹理；分形维数；分形理论；数字图像；横向力系数；抗滑性能

Relationship between the texture feature of asphalt pavement and

skid resistant performance based on fractal theory

SHU Chunjian¹, HU Yumei²

1.CCCC First Highway Consultants Co., Ltd, Xi′an 710075, China;

2.School of Automation, Northwestern Polytechnical University, Xi′an 710072, China

Abstract:To improve the skid resistance performance of asphalt pavement, combined with the photos of paved asphalt pavement of a highway engineering project in Xinjiang and its measured transverse force coefficient data, the relationship between the fractal dimension of asphalt pavement texture and the skid resistance performance is studied with digital image processing technology and fractal theory, and the change law of fractal dimension of asphalt pavement texture against vehicle loads number is discussed through indoor tests. The results show that the transverse force coefficient of pavement is positively correlated with the fractal dimension of pavement texture and the fractal dimension generally shows a downward trend with the increase the times of loading repetition, and the decrease is sharp in the primary stage of application, which makes the skid resistant performance decrease rapidly.

Keywords:asphalt pavement texture; digital image; fractal dimension; digital image; transverse force coefficient; skid resistant performance