IDEAS home Printed from https://ideas.repec.org/a/wly/perpro/v35y2024i3p384-394.html
   My bibliography  Save this article

Cooling Performance of a Novel Ventilated Slope on Railbed in Permafrost Regions

Author

Listed:
  • Zhenyu Zhang
  • Zhi Wen
  • Youqian Liu
  • Xinbin Wang
  • Jinxin Lu
  • Kun Chen
  • Delong Zhang
  • Qihao Yu

Abstract

The heat absorption of the railbed mainly originates from the embankment slope in permafrost regions. A novel ventilated slope (NVS) with a double‐layer convection channel is proposed and verified. By applying this method to the Qinghai–Tibet Railway (QTR), the annual average temperature at the 10 cm depth below the embankment slope surface under NVS was reduced by 4.95°C. The freezing index at the 10 cm depth of NVS was 1.78 times higher than that of the slope without any cooling approaches. The numerical simulation results showed that heat was accumulated for the conventional embankment, while heat was released from the railbed after the application of NVS. With the cooling effect of NVS, the 0°C isotherm would rise above the original natural ground surface in the 2nd year after the embankment construction. A low‐temperature region of −2°C would be observed in the underlying permafrost by the 10th year. The underlying permafrost would remain frozen in the 50th year. This study provides a novel method for protecting the underlying permafrost in permafrost regions.

Suggested Citation

  • Zhenyu Zhang & Zhi Wen & Youqian Liu & Xinbin Wang & Jinxin Lu & Kun Chen & Delong Zhang & Qihao Yu, 2024. "Cooling Performance of a Novel Ventilated Slope on Railbed in Permafrost Regions," Permafrost and Periglacial Processes, John Wiley & Sons, vol. 35(3), pages 384-394, July.
    • Handle: RePEc:wly:perpro:v:35:y:2024:i:3:p:384-394
    DOI: 10.1002/ppp.2222
    as

    Download full text from publisher

    File URL: https://doi.org/10.1002/ppp.2222
    Download Restriction: no
    File URL: https://libkey.io/10.1002/ppp.2222?utm_source=ideas
    LibKey link: if access is restricted and if your library uses this service, LibKey will redirect you to where you can use your library subscription to access this item
    ---><---

    More about this item

    Statistics

    Access and download statistics

    Corrections

    All material on this site has been provided by the respective publishers and authors. You can help correct errors and omissions. When requesting a correction, please mention this item's handle: RePEc:wly:perpro:v:35:y:2024:i:3:p:384-394. See general information about how to correct material in RePEc.

    If you have authored this item and are not yet registered with RePEc, we encourage you to do it here. This allows to link your profile to this item. It also allows you to accept potential citations to this item that we are uncertain about.

    We have no bibliographic references for this item. You can help adding them by using this form .

    If you know of missing items citing this one, you can help us creating those links by adding the relevant references in the same way as above, for each refering item. If you are a registered author of this item, you may also want to check the "citations" tab in your RePEc Author Service profile, as there may be some citations waiting for confirmation.

    For technical questions regarding this item, or to correct its authors, title, abstract, bibliographic or download information, contact: Wiley Content Delivery (email available below). General contact details of provider: https://doi.org/10.1002/(ISSN)1099-1530 .

    Please note that corrections may take a couple of weeks to filter through the various RePEc services.

    IDEAS is a RePEc service. RePEc uses bibliographic data supplied by the respective publishers.