江西省高速公路沥青路面温度特征与沥青PG分级  

Characteristics of Asphalt Pavement Temperature and PG Classification for Expressways in Jiangxi Province

作　　者：曹林涛[1] 阙云[2] 

机构地区：[1]湖北文理学院建筑工程学院,襄阳市441053 [2]福州大学土木工程学院,福州市350108

出　　处：《公路》2015年第8期14-20,共7页Highway

基　　金：湖北省自然科学基金;项目编号2012FFC05701

摘　　要：以江西省典型气候与高速公路路面结构为例,采用有限差分技术模拟江西省高速公路沥青混凝土路面温度时空特征。在此基础上,讨论适用于江西省各地区的沥青PG分级。结果表明:江西省各地区沥青混凝土路面最高温度普遍达到60℃以上,各地温度最大相差2.5℃;高温季节吉安地区路面温度最高,南昌地区与景德镇地区路面温度次之,南城与赣州地区路面温度最低。各季节下路面最高温度依次出现在7月份、10月份、4月份、1月份,且春秋两季的路面温度场相差不大。在连续多天的环境温度与太阳辐射作用下,随深度的增加,路面实际温度变化较气温和太阳辐射滞后性增强。建议江西省南部以PG76-10等级的沥青为宜,江西省北部以PG70-16等级的沥青为宜。Taking the highway pavement structure and typical climate in Jiangxi province as an example, spatial and temporal characteristics of pavement temperature of expressway in Jiangxi province is discussed based on the finite difference technique and based on this, asphalt PG classification in Jiangxi province is discussed. The results show that maximum temperature of asphalt pavement of expressway in Jiangxi province can reach above 60℃, and the maximum temperature difference of different regions is 2.5℃. In high temperature season, pavement temperature in Ji＇an region is the highest, Nanchang area and Jingdezhen region are in the second place, and Nancheng and Ganzhou region seem to be the lowest. Successive order of maximum pavement temperature is in July, October, April, January, and the pavement temperature field in spring is similar to that in autumn. With the increasing of depth, the change of surface temperature lags those of air temperature and solar radiation in the action of consecutive days of air temperature and solar radiation. It is recommended that PG76-- 10 grading asphalt is used in southern Jiangxi while PG70-- 16 grading asphalt is used in northern Jiangxi.

关 键 词：沥青混凝土路面 有限差分 温度 PG分级 

分 类 号：U416.217[交通运输工程—道路与铁道工程]