沥青路面智能压实及其关键影响因素研究  

Intelligent Compaction of Asphalt Pavement and Its Key Influencing Factors

作　　者：朱慧芳 王亮 ZHU Huifang;WANG Liang(Zhejiang Transportation Group Expressway Quzhou Management Center,Quzhou,Zhejiang 324000,China)

机构地区：[1]浙江省交通集团高速公路衢州管理中心,浙江衢州324000

出　　处：《中外公路》2024年第4期47-55,共9页Journal of China & Foreign Highway

基　　金：武汉理工大学新材料力学理论与应用湖北省重点实验室开放基金资助项目(编号:TAM202201)。

摘　　要：智能压实作为一种新型道路施工质量监测与管理技术,在沥青路面压实过程中得到了广泛应用。然而,由于缺乏对压实过程以及沥青混合料颗粒间相互作用机理的了解,实际施工中常出现过压及压实不均匀的问题,这些问题对道路施工质量及服役性能产生了严重影响。该文通过工程现场与室内试验相结合的方法,利用地质统计模型半变异函数分析了沥青混合料压实度随压实次数的变化特征,并讨论了温度对混合料压实度的影响;此外,通过室内旋转压实仪与SmartRock传感器,从细观尺度揭示不同压实温度下混合料颗粒受力及转角特征。研究结果表明:压实度的大小及均匀性并非总是与压实遍数呈正相关。过度压实会导致压实度及其均匀性降低。同时,现场压实温度的变化对混合料压实度具有显著影响。在较高的温度下,沥青混合料的压实度增幅较大,且最终压实均匀性较高。通过Smart-Rock传感器的受力及转角特征定量研究混合料在压实作用下的细观响应,发现混合料内部的动力响应可直接反映沥青混合料压实度的变化,并发现温度变化与压实效果之间未始终呈现正相关,只有在合适的温度范围内,沥青混合料才能达到最佳压实效果。Intelligent compaction,as a new type of road construction quality monitoring and management technology,has been widely used in the compaction process of asphalt pavement.However,due to the lack of understanding of the compaction process and the interaction mechanism between asphalt mixture particles,the problems of over-compaction and non-uniformity of compaction often occur in the actual construction,which seriously affects the quality of road construction and service performance.In this study,through the combination of the engineering field and indoor tests,the variation characteristics of asphalt mixture compaction with the number of compaction were analyzed by using the semi-variance function of the geostatistical model,and the effect of temperature on the mixture compaction was discussed.Moreover,through the indoor gyratory compactor and SmartRock sensor,the force and rotational angle characteristics of mixture particles were revealed from the fine scale under different compaction temperatures.The results show that the size and uniformity of compaction are not always positively correlated with the number of compaction.Over-compaction may result in lower compaction and uniformity.Meanwhile,the variation of field compaction temperature has a significant effect on the compaction of mixtures.At higher temperatures,the compaction of the asphalt mixture increases faster,and the final compaction uniformity is higher.Through the quantitative study of the fine-scale response of the mixture by considering the force and rotational angle characteristics by SmartRock sensor,it is found that the dynamic response within the mixture can directly reflect the asphalt mixture compaction changes,and the temperature change and compaction effect do not always show a positive correlation.Only in the appropriate temperature range,the asphalt mixture can achieve the best compaction effect.

关 键 词：道路工程 智能压实 智能颗粒传感器 旋转压实 

分 类 号：U416.2[交通运输工程—道路与铁道工程]