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Aug 12, 2020
Analysis of Natural Environmental Freeze-Thaw Cycles along the Qinghai-Tibet Highway
Authors: Wei Si, Ph.D. [email protected], Yong-Ping Hu [email protected], Xing-Xiang Kang [email protected], Duo-Jie Ci-Dan [email protected], Long-Zhu Ren-Qian [email protected], and Biao Ma, Ph.D. [email protected]Author Affiliations
Publication: CICTP 2020
ABSTRACT
Nearly 60 years of meteorological data from six regions along the Qinghai-Tibet Highway is used to analyze the variation trends in natural environmental freeze-thaw cycles. The difference between the indoor freeze-thaw cycle test and freeze-thaw effect of actual environment is compared in this research. The classification criterion of freeze-thaw intensity is proposed based on the impact of freezing temperature and melting temperature, and freeze-thaw intensity is divided into two main types: weak freeze-thaw and strong freeze-thaw. The variation trends of monthly freeze-thaw cycles, and annual freeze-thaw cycles are analyzed. Comparison of freeze-thaw cycles in the six regions are carried out to illustrate the difference of natural environmental freeze-thaw cycles along the Qinghai-Tibet Highway. Results indicate that the freeze-thaw effect is still the main factor influencing the performance of asphalt pavement in cold regions of Qinghai-Tibet Plateau, and freeze-thaw should receive high attention during the pavement design, construction, and maintenance.
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© 2020 American Society of Civil Engineers.
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Published online: Aug 12, 2020
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1Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an Univ., Xi’an, Shaanxi 710064, China. Email: [email protected]
2Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an Univ., Xi’an, Shaanxi 710064, China. Email: [email protected]
3Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an Univ., Xi’an, Shaanxi 710064, China. Email: [email protected]
4Tibet Tianlu Co. Ltd. Postdoctoral Workstation, Tibet Tianlu Co. Ltd., Lhasa, Tibet 850000, China. Email: [email protected]
5Tibet Tianlu Co. Ltd. Postdoctoral Workstation, Tibet Tianlu Co. Ltd., Lhasa, Tibet 850000, China. Email: [email protected]
6Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an Univ., Xi’an, Shaanxi 710064, China. Email: [email protected]
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