摘要
为了分析具有排水性沥青面层的半刚性基层路面的温度场,建立了二维有限元模型来对半刚性基层路面的温度场进行预估,并对沪宁高速镇江支线两种结构形式的沥青路面的温度场进行了长时间的监测。发现排水性沥青上面层底面的夏季日最高温度较普通密级配沥青路面低2℃左右,冬季最低温度高1℃左右;排水性沥青路面的半刚性基层顶面日温度变幅较普通密级配沥青混凝土路面低3～4℃;建立的温度预估模型计算结果与实测温度相差较小。结果表明,排水性沥青面层有很好的温度调节作用,能有效改善半刚性基层的温度状况;建立的温度模型可以对半刚性基层路面的温度场进行可靠的预估。
A 2-D finite element model was developed to calculate the temperature of semi-rigid pavement, and long time of temperature data of two combinations of mixture type at Huning expressway was measured. The purpose was to analyze the temperature fields of semi-rigid pavement with porous asphalt course. Based on the FEM model and the temperature data, some of general conclusions are made that the layer interface beneath porous asphalt course is about 2℃ cooler in summer and about 1℃ hotter in winter comparing with that of conventional dense-graded surface and that porous asphalt course resulted in semi-rigid base being about 3 -4℃ lower comparing with that of conventional dense-graded surface, And there was little difference between the calculated value and the measured data. These results indicate that porous asphalt course could efficiently ameliorate temperature status of semi-rigid base; and that the 2-D finite element model proved to be valid to predict the temperature of semi-rigid pavement.
出处
《公路交通科技》
CAS
CSCD
北大核心
2006年第10期15-19,共5页
Journal of Highway and Transportation Research and Development
基金
国家西部交通建设项目(200131822332)
关键词
排水性沥青路面
半刚性基层
温度场
有限元法
porous asphalt pavement
semi-rigid base
temperature field
finite-element methodology
