沥青面层的车辙等效温度

Rutting Equivalent Temperature for Asphalt Pavement

分析了沥青面层车辙寿命与面层温度的均值和梯度的相互关系,讨论了沥青面层压应力分布规律.根据全国90个地区多年的路面温度场数据,对沥青面层车辙等效温度进行了计算和分析,总结了沥青面层准车辙等效温度与年均气温、月均气温的年极差之间的回归关系,据此推算得到了全国738个地区的沥青面层基准车辙等效温度值,并绘制了可供设计采用的全国沥青面层基准车辙等效温度等值图,归纳了非基准条件的各因素对沥青面层车辙等效温度的影响规律,给出了它们的近似计算式.最后,通过对比分析,验证了沥青面层车辙等效温度计算方法和结果的可靠性.

The relationship between the rutting life of asphalt pavement and its average temperature, temperature gradient were analyzed. The distribution of compression stresses for asphalt surface layer was discussed. Based on the pavement temperature field data collected at 90 areas in China over the years, the corresponding rutting equivalent temperatures were calculated and analyzed, the correlation between the standard rutting equivalent temperature and annual average temperature and difference of the highest and lowest monthly average temperature were summarized. Hence, the standard rutting equivalent temperatures for asphalt pavement at 738 areas in China were calculated, for design purpose, a contour map of the standard rutting equivalent temperatures was initially proposed. Moreover, the influences of various factors in the non-standard conditions on the rutting equivalent temperature for asphalt pavement were analyzed, and a set ofapproximate formulas were given accordingly. At last, through a comparative study, the reliability of the calculation method and corresponding results were validated.