沥青路面面层温度分布规律

发布时间：2018-01-10 07:29

本文关键词：沥青路面面层温度分布规律　出处：《中国公路学报》2014年04期 　论文类型：期刊论文

【摘要】：为给沥青路面设计与施工提供参考,基于路面温度实测数据利用数理统计方法,对沥青路面面层温度分布规律进行了深入研究,利用广州、宁波、大同的实测数据分析了沥青面层层均温度的年分布规律;提出表征路表温度分布密度曲线形态的3个特征值(路表温度众值、路表高温率和路表温度变幅);研究了标准材料热力参数下沥青路表温度年均值、年标准差与气象、地理参数的关系;利用739个地区数据绘制了标准材料热力参数下全国沥青路表温度年均值等值图和年标准差等值图,提出了在非标准材料热力参数情况下的修正式。研究结果表明:地区差异对沥青面层层均温度的年分布密度曲线形态影响显著,但面层厚度对其影响较小,可忽略不计;对应于年内不同层均温度的温度梯度均值随着层均温度的增大而增大,其变化可分为缓慢增大、平缓过渡和急剧增大3个阶段,面层厚度对其影响亦较小,可忽略不计;中国沥青路面路表温度的年分布密度曲线形态可分双峰、单峰、过渡形态3种,呈双峰分布形态的代表区域为华北中南部、华中、华东大部、西北东部和西南部分地区,单峰分布形态仅局限于华南沿海地区,过渡形态的代表区域为东北、华北北部、华东南部、西北大部和部分西南地区。
[Abstract]:In order to provide reference for the design and construction of asphalt pavement, based on the measured data of pavement temperature, the temperature distribution law of asphalt pavement surface is studied in depth, using Guangzhou, Ningbo. The annual distribution of the average temperature of asphalt surface layer is analyzed by the measured data of Datong. Three characteristic values are proposed to characterize the shape of the road surface temperature distribution density curve: the common value of the road surface temperature, the road surface temperature rate and the amplitude of the road surface temperature variation. The relationship between annual mean of asphalt surface temperature, annual standard deviation and meteorological and geographical parameters under thermodynamic parameters of standard materials is studied. Based on the data of 739 regions, the annual mean annual equivalent map and the annual standard deviation equivalent map of the national asphalt surface temperature under the thermodynamic parameters of the standard materials are drawn. The results show that the regional differences have a significant effect on the shape of the annual distribution density curve of the average temperature of the asphalt surface layer, but the thickness of the surface layer has little effect on it. Negligible; The mean temperature gradient corresponding to the average temperature of different layers increases with the increase of the average layer temperature, and the change can be divided into three stages: slow increase, gentle transition and sharp increase, and the influence of the thickness of the surface layer on it is also small. Negligible; The annual distribution density curve of asphalt pavement surface temperature in China can be divided into three types: double peak, single peak and transition pattern. The representative areas with double peak distribution are central and southern North China, central China and eastern China. In the eastern part of the northwest and some parts of the southwest, the distribution of single peak is confined to the coastal areas of South China, and the transition pattern is represented by the northeast, the north of North China, the southeast of China, the majority of the northwest and part of the southwest.
【作者单位】：同济大学道路与交通工程教育部重点实验室;上海市政工程设计研究总院(集团)有限公司;
【基金】：交通运输部西部交通建设科技项目(2008 318 000 99)
【分类号】：U416.217
【正文快照】： 0引言地域和气候条件不同导致沥青路面面层温度周期性变化规律和特征差异显著。沥青混合料的温度依赖性使沥青层的使用性能(疲劳开裂、永久变形和使用寿命)与温度状况密切关联,因此沥青层设计参数具有地域和温度特性。沥青路面破坏的产生与发展不仅与代表温度(七月平均最高气

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