Quantification and statistics of site freezethaw cycles in
QinghaiTibet plateau cold region
1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang′an University, Xi′an, Shaanxi 710064, China; 2. Postdoctoral Research Station, Tibet Tianlu Co., Ltd., Lhasa, Tibet 850000, China; 3. Traffic Science Institute of Tibet, Lhasa, Tibet 850000, China
Abstract：The temperature and precipitation meteorological data for near 60 years in six regions along the QinghaiTibet highway were statistically analyzed, and four temperature ranges were proposed to show the environment impacts on pavement performance. The freezethaw intensity classification criterion was proposed based on the temperature influence on asphalt pavement structure, and freeze temperature and thaw temperature were simultaneously considered in the freezethaw intensity classification criterion. The freezethaw intensity was classified as weak freezethaw and strong freezethaw. The site freezethaw cycles in six regions were analyzed, and the statistical characteristics were obtained. The annual field freezethaw cycles in six regions were almost more than 150 times. The results show that the freezethaw cycles in six regions are different, and the freezethaw cycles present seasonal concentration trends. The freezethaw mainly happens in rapid cooling temperature range, fast warming temperature range and continual low temperature range. The influence of freezethaw cycles is the critical environment factor on highway engineering.
司伟, 马骉, 仁乾龙珠, 格桑泽仁, 李宁. 青藏高寒地区真实环境冻融作用的量化与统计[J]. 江苏大学学报（自然科学版）, 2019, 40(2): 237-243.
SI Wei, MA Biao, REN Qian-Long-Zhu, GE Sang-Ze-Ren, LI Ning. Quantification and statistics of site freezethaw cycles in
QinghaiTibet plateau cold region[J]. Journal of Jiangsu University(Natural Science Eidtion)
, 2019, 40(2): 237-243.
2019, Vol. 40 
