摘要
在某高速公路选取了不同车辙深度的多个横断面,在路肩处进行了全厚式沥青面层的取样,在三层式取样试件内部形成了沿厚度方向的温度梯度;开展轮辙试验测得了其整体动稳定度,分析了设计年限末路面车辙预估深度与实测整体动稳定度之间的关系;以15 mm车辙深度对应的整体动稳定度作为调研路段的结构抗车辙性能控制标准,开展了不同材料组合和厚度组合结构的轮辙试验,并以该整体动稳定度控制标准为依据进行了结构组合的优选。研究结果表明,通过分析现场车辙深度与对应沥青面层整体动稳定度之间的关系,确定沥青面层结构整体动稳定度的控制标准,此方法可以运用于类似道路的结构组合优选。
Multiple cross-sections with various rutting depths are selected in an expressway to be investigated. Field samples of total thickness asphalt surface course are taken at road shoulder, and temperature gradient along the depth is formed inside 3-layer field samples. Then, wheel tracking tests on these field samples are carried out to obtain total dynamic stability （DS）. The relationship between the estimated pavement rut depth and measured total DS at the end of the design life is analyzed. Regarding the total DS value corresponding to rut depth of 15 mm as the anti-rut performance controlling standard of the surface structure of investigation section, wheel tracking tests on the structures of different material and thickness combinations are carried out, and then structure combinations are optimized according to the anti-rut performance controlling standard. The results indicate that it is feasible to apply the method of determining the total DS controlling standard of asphalt surface course sample by analyzing the relationship between rut depth on site and the total DS of asphalt surface course sample to optimize structure combination for similar roads.
出处
《公路交通科技》
CAS
CSCD
北大核心
2015年第1期30-34,40,共6页
Journal of Highway and Transportation Research and Development
基金
国家自然科学基金项目(51038002)
关键词
道路工程
沥青面层
全厚式轮辙试验
整体动稳定度
结构组合优选
road engineering
asphalt surface course
total thickness wheel tracking test
total dynamic stability
structure combination optimization
