引用本文:胡洪龙,谈至明.港区沥青铺面面层的等效温度[J].水利水运工程学报,2014,(3):37-41
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 1293次   下载 866 本文二维码信息
码上扫一扫!
分享到: 微信 更多
港区沥青铺面面层的等效温度
胡洪龙, 谈至明
同济大学, 交通运输工程学院, 道路与交通工程教育部重点实验室
摘要:
不同于常规公路路面结构所承受的车辆荷载,港区铺面结构具有承受装运机械荷载类型多、荷载量大、运行速度低和重复作用次数少等特点。根据港区沥青铺面设计准则,分别基于面层层底弯拉应变、半刚性基层层底弯拉应力、土基顶面压应变等3个设计指标和Miner损伤叠加原理,介绍了港区沥青铺面面层等效温度概念及其计算方法;建立了基准状况下面层等效温度与地区海拔、铺面表面温度年均值及其标准差之间的回归式;为了简便实用,又建立了基准面层等效温度与2个常见的气象参数即年平均气温和月平均气温年极差之间的回归关系式;绘制了全国基准面层等效温度等值线图;总结了非基准各因素对面层等效温度的影响规律,给出了近似修正式。
关键词:  港区  铺面工程  面层等效温度  疲劳寿命  修正系数  Miner叠加原理
DOI:
分类号:U416
基金项目:交通运输部水运工程建设项目
Equivalent temperature for the port asphalt pavement surface course
HU Hong-long, TAN Zhi-ming
Key Laboratory of Road and Traffic Engineering of Ministry of Education, School of Transportation Engineering, Tongji University
Abstract:
Unlike the vehicle loading upon the conventional road pavement structure, the port pavement structure is characterized by many types of shipping mechanical loads, heavy load carrying capacity, low operating speed and having no more repetition frequency of the vehicle loading. According to the port asphalt pavement design criteria, based on the tensile strain at the bottom of the surface course, the tensile stress at the bottom of the semi-rigid course, the compression strain on the top of the subgrade and Miner damage superimposed principle, conception and calculation method of the equivalent temperature for the port asphalt pavement surface course are introduced in this study. Regression formulas among the standard equivalent temperatures for the surface course, the altitude of the asphalt pavement located, pavement surface average temperature and its standard deviation over the years are established. To be simple and practical, the regression formulas between the equivalent temperature for the surface course and two common meteorological parameters, annual average temperature and difference of the highest and lowest monthly average temperature, are established. The contour maps in China of the equivalent temperatures for the surface course are drawn. Finally, the influence rules of various factors on the equivalent temperatures for the surface course are summarized and an approximate modified formula is given.
Key words:  harbor district  pavement engineering  equivalent temperature for surface course  fatigue life  modified coefficient  Miner superimposed principle
手机扫一扫看