摘要
为了进一步表征沥青路面抗滑性能,通过对轮胎与路面间接触力学特性的分析,构建了沥青路面抗滑模型;以AC-13、GAC-13和UTAC-10的沥青混合料作为研究对象,采用激光纹理测量仪获取路面纹理三维信息,并开展压力胶片等相关试验获取模型中各参数值;通过模型结果与摆值的相关性分析验证模型的有效性,并探索模型中黏附摩擦作用和咬合作用对路面抗滑作用的贡献情况。结果显示:模型结果与摆值的相关性达0.9881,表明此模型能很好地表征沥青路面抗滑性能。各路面的黏附摩擦作用系数在0.3~0.4范围内均大于咬合作用系数(0.1~0.25范围内),表明道路运营初期时路面抗滑作用主要来源于黏附摩擦作用。此外,咬合作用系数高意味着在抗滑性能衰减中后期或者存在水等不利条件下路面具有更好的抗滑潜能。
To further characterize the skid resistance of asphalt pavement,an asphalt pavement skid resistance model was established by analyzing the mechanical characteristics of tire-pavement contact.The asphalt mixes of AC-13,GAC-13 and UTAC-10 were used as research objects,and the laser texture measuring instrument was used to obtain 3D information of pavement texture,and related tests such as pressure films were carried out to obtain the values of each parameter in the model.The validity of the model was verified by correlation analysis between the model results and BPN,andthe contribution of adhesive friction and occlusion to pavement skid resistance was explored in the model.The result shows that the correlation between the model results and BPN reaches 0.9881,indicating that this model can well characterise the skid resistance of asphalt pavements.The coefficient of adhesion friction of each pavement is greater than the coefficient of occlusion(in the range of 0.1~0.25)in the range of 0.3~0.4,which indicates that adhesion friction is the main factor affecting the anti-skid performance of pavements in the early stage of road operation.In addition,a high coefficient of occlusion means that the pavement has a better skidding potential in the middle and late stages of skidding decay or under unfavourable conditions such as the presence of water.
作者
李智
陈伟勇
LI Zhi;CHEN Weiyong(School of Civil Engineering&Transportation,South China University of Technology,Guangzhou,Guangdong 510641,China)
出处
《公路工程》
2024年第5期71-77,100,共8页
Highway Engineering
基金
国家自然科学基金资助项目(51378223)
广东省交通运输厅科技项目(科技-2016-02-002)。
关键词
沥青路面
接触力学特性
抗滑模型
压力胶片
等效摩擦系数
asphalt pavement
contact mechanical characteristics
skid-resistant model
pressure film
equivalent friction coefficient
