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Ground temperature and deformation analysis for an expressway embankment in warm permafrost regions of the Tibet plateau

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  • Jiankun Liu
  • Bowen Tai
  • Jianhong Fang

Abstract

The physical and mechanical processes relating to infrastructure are strongly intertwined in subgrades of road or railway in warm permafrost regions, where the evolution of these processes may influence the functionality of infrastructure. Thus, this study analyzed the embankment thermal regime and thaw settlement behavior based on monitored data for three sections of the newly constructed Gonghe–Yushu expressway (GYE) in a warm permafrost area of Tibet. The efficiencies of crushed rock, ventilated, and insulated embankments in maintaining permafrost temperature were evaluated in relation to the permafrost table (PT) and the annual warming rate of the permafrost. The deformation characteristics of three embankments for different soil layers are summarized, along with analysis of heat balance. The results show that: (a) the permafrost thaw rate has a positive linear correlation with mean annual ground temperature; (b) the permafrost displays a warming trend regardless of whether PT increases or decreases; (c) the total deformation of a given embankment shows a tendency toward settlement; and (d) subgrade peak thaw settlement occurs later than its maximum seasonal thaw depth.

Suggested Citation

  • Jiankun Liu & Bowen Tai & Jianhong Fang, 2019. "Ground temperature and deformation analysis for an expressway embankment in warm permafrost regions of the Tibet plateau," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 30(3), pages 208-221, July.
    • Handle: RePEc:wly:perpro:v:30:y:2019:i:3:p:208-221
    DOI: 10.1002/ppp.2007
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    Cited by:

    1. Hao Wang & Lun Ji & Hongju Zhang & Yuqi Lou & Linlin Xu & Yiqiu Tan, 2023. "Indicator Construction of Road Surface Deformation Activity in Cold Regions and Its Relationship with the Distribution and Development of Longitudinal Cracks," Sustainability, MDPI, vol. 15(21), pages 1-16, October.
    2. Shuangjie Wang & Fujun Niu & Jianbing Chen & Yuanhong Dong, 2020. "Permafrost research in China related to express highway construction," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 31(3), pages 406-416, July.
    3. Guanfu Wang & Jiajun Bi & Youkai Fan & Long Zhu & Feng Zhang & Decheng Feng, 2022. "Settlement Characteristic of Warm Permafrost Embankment with Two-Phase Closed Thermosyphons in Daxing’anling Mountains Region," Sustainability, MDPI, vol. 14(19), pages 1-20, September.

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