西安地区沥青路面性能温度分区

Temperature field division in Xi'an for asphalt pavement performance

为了合理选择沥青结合料,根据西安地区30 a最冷月、最热月的气温、地温资料的统计分析,并对比美国SHRP(Strategic Highway Research Program)方法与中国规范方法,提出用98%保证率的连续7 d平均高地温作为沥青路面的高温设计温度,98%保证率的年极端最低地温作为沥青路面低温设计温度。用该方法进行了西安地区沥青路面性能区划,符合西安地区的实际情况。

In order to choose asphalt types reasonably, the temperature field division in Xi＇an was studied according to 30 years＇ climate datum. According to statistics analysis of 30 years＇ air temperature and field temperature in the hottest and the coldest month, it was suggested that high pavement design temperature should be determined by the average high field temperature with 98% assurance rate in seven consecutive days, the low pavement design temperature should be determined by the lowest field temperature of a year with 98% assurance rate. This method was applied in Xi＇an to decide the temperature field division, the results are in accordance with Xi＇an conditions. 6 tabs, 3 figs, 8 refs.