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Field investigation on the influence of periglacial processes on pile foundations on the Qinghai–Tibet plateau

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  • Lei Guo
  • Yanhui You
  • Qihao Yu
  • Zhaoyun Shi
  • Hongbi Li
  • Xinbin Wang

Abstract

Periglacial processes can threaten the operation of engineering infrastructure. Based on field observations, the influence of four types of periglacial processes on tower foundations along the Qinghai–Tibet Engineering Corridor were investigated. These periglacial processes change the local thermal and hydraulic processes in soils around the pile foundations, thereby threatening their stability. Frost heaving‐related periglacial phenomena and fast mass wasting are major threats for the operation of pile foundations. The long‐term stability of pile foundations is also threatened by thermokarst‐related periglacial processes and slow mass wasting under the evolving climate change scenario on the Qinghai–Tibet Plateau. Frost weathering has a slight impact on the stability of concrete pile heads, and the long‐term effects of this cannot be ignored. In addition to the impacts of periglacial processes, piles are also affected by engineering problems in areas with shallow artesian ground water, where the use of thermosyphons is associated with frost jacking of the foundations. Further studies are needed on the thermal and hydraulic regimes in soils under the influence of artesian ground water and thermokarst lakes/ponds.

Suggested Citation

  • Lei Guo & Yanhui You & Qihao Yu & Zhaoyun Shi & Hongbi Li & Xinbin Wang, 2021. "Field investigation on the influence of periglacial processes on pile foundations on the Qinghai–Tibet plateau," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 32(3), pages 335-348, July.
    • Handle: RePEc:wly:perpro:v:32:y:2021:i:3:p:335-348
    DOI: 10.1002/ppp.2092
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    References listed on IDEAS

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    1. Yuzhong Yang & Qingbai Wu & Yandong Hou & Peng Zhang & Hanbo Yun & Huijun Jin & Xiaoming Xu & Guanli Jiang, 2019. "Using stable isotopes to illuminate thermokarst lake hydrology in permafrost regions on the Qinghai‐Tibet plateau, China," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 30(1), pages 58-71, January.
    2. Xicai Pan & Yanhui You & Kurt Roth & Lei Guo & Xinbing Wang & Qihao Yu, 2014. "Mapping Permafrost Features that Influence the Hydrological Processes of a Thermokarst Lake on the Qinghai‐Tibet Plateau, China," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 25(1), pages 60-68, January.
    3. Yanhui You & Qihao Yu & Xicai Pan & Xinbin Wang & Lei Guo, 2017. "Geophysical Imaging of Permafrost and Talik Configuration Beneath a Thermokarst Lake," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 28(2), pages 470-476, April.
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    Cited by:

    1. Jun Zhang & Chenglin Zhou & Ze Zhang & Andrey Melnikov & Doudou Jin & Shengrong Zhang, 2022. "Physical Model Test and Heat Transfer Analysis on Backfilling Construction of Qinghai-Tibet Transmission Line Tower Foundation," Energies, MDPI, vol. 15(7), pages 1-15, March.

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