Settlement Characteristic of Warm Permafrost Embankment with Two-Phase Closed Thermosyphons in Daxing’anling Mountains Region
The Xing’anling Mountains are the second largest permafrost region in China. One of the important issues for highways in these regions is how to control the settlement during the operation period to meet the demand of road stability. This paper selects a typical permafrost embankment in the Daxing’a...
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ftmdpi:oai:mdpi.com:/2071-1050/14/19/12272/ 2023-08-20T04:09:08+02:00 Settlement Characteristic of Warm Permafrost Embankment with Two-Phase Closed Thermosyphons in Daxing’anling Mountains Region Guanfu Wang Jiajun Bi Youkai Fan Long Zhu Feng Zhang Decheng Feng agris 2022-09-27 application/pdf https://doi.org/10.3390/su141912272 EN eng Multidisciplinary Digital Publishing Institute Sustainable Transportation https://dx.doi.org/10.3390/su141912272 https://creativecommons.org/licenses/by/4.0/ Sustainability; Volume 14; Issue 19; Pages: 12272 permafrost region embankment on-site monitoring finite element method thermal characteristics two-phase closed thermosyphon Text 2022 ftmdpi https://doi.org/10.3390/su141912272 2023-08-01T06:39:10Z The Xing’anling Mountains are the second largest permafrost region in China. One of the important issues for highways in these regions is how to control the settlement during the operation period to meet the demand of road stability. This paper selects a typical permafrost embankment in the Daxing’anling Mountains permafrost region, presents the finite element models of the embankment, and verifies it using field monitoring data to study the thermal and deformation characteristics within 50 years after construction. Calculation results illustrate that the permafrost under the embankment has degraded significantly during the operation period of the highway and led to serious settlement. To prevent the degradation of permafrost, a series of models with two-phase closed thermosyphons (TPCTs) were established to analyze the cooling effect. The contribution of different factors, including install locations, depth, and shapes of the TPCTs, were assessed on their effects on cooling the permafrost and reducing the embankment settlement. Results show that the TPCTs have an excellent cooling effect on the permafrost embankment. However, as the TPCTs change the temperature distribution of the embankment, they will inevitably cause differential settlement. In order to ensure the cooling effect and reduce the differential settlement of the embankment, it is suggested that L-shaped TPCTs should be adopted in the remedial engineering. Text permafrost MDPI Open Access Publishing Sustainability 14 19 12272 |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
permafrost region embankment on-site monitoring finite element method thermal characteristics two-phase closed thermosyphon |
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permafrost region embankment on-site monitoring finite element method thermal characteristics two-phase closed thermosyphon Guanfu Wang Jiajun Bi Youkai Fan Long Zhu Feng Zhang Decheng Feng Settlement Characteristic of Warm Permafrost Embankment with Two-Phase Closed Thermosyphons in Daxing’anling Mountains Region |
topic_facet |
permafrost region embankment on-site monitoring finite element method thermal characteristics two-phase closed thermosyphon |
description |
The Xing’anling Mountains are the second largest permafrost region in China. One of the important issues for highways in these regions is how to control the settlement during the operation period to meet the demand of road stability. This paper selects a typical permafrost embankment in the Daxing’anling Mountains permafrost region, presents the finite element models of the embankment, and verifies it using field monitoring data to study the thermal and deformation characteristics within 50 years after construction. Calculation results illustrate that the permafrost under the embankment has degraded significantly during the operation period of the highway and led to serious settlement. To prevent the degradation of permafrost, a series of models with two-phase closed thermosyphons (TPCTs) were established to analyze the cooling effect. The contribution of different factors, including install locations, depth, and shapes of the TPCTs, were assessed on their effects on cooling the permafrost and reducing the embankment settlement. Results show that the TPCTs have an excellent cooling effect on the permafrost embankment. However, as the TPCTs change the temperature distribution of the embankment, they will inevitably cause differential settlement. In order to ensure the cooling effect and reduce the differential settlement of the embankment, it is suggested that L-shaped TPCTs should be adopted in the remedial engineering. |
format |
Text |
author |
Guanfu Wang Jiajun Bi Youkai Fan Long Zhu Feng Zhang Decheng Feng |
author_facet |
Guanfu Wang Jiajun Bi Youkai Fan Long Zhu Feng Zhang Decheng Feng |
author_sort |
Guanfu Wang |
title |
Settlement Characteristic of Warm Permafrost Embankment with Two-Phase Closed Thermosyphons in Daxing’anling Mountains Region |
title_short |
Settlement Characteristic of Warm Permafrost Embankment with Two-Phase Closed Thermosyphons in Daxing’anling Mountains Region |
title_full |
Settlement Characteristic of Warm Permafrost Embankment with Two-Phase Closed Thermosyphons in Daxing’anling Mountains Region |
title_fullStr |
Settlement Characteristic of Warm Permafrost Embankment with Two-Phase Closed Thermosyphons in Daxing’anling Mountains Region |
title_full_unstemmed |
Settlement Characteristic of Warm Permafrost Embankment with Two-Phase Closed Thermosyphons in Daxing’anling Mountains Region |
title_sort |
settlement characteristic of warm permafrost embankment with two-phase closed thermosyphons in daxing’anling mountains region |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2022 |
url |
https://doi.org/10.3390/su141912272 |
op_coverage |
agris |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Sustainability; Volume 14; Issue 19; Pages: 12272 |
op_relation |
Sustainable Transportation https://dx.doi.org/10.3390/su141912272 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/su141912272 |
container_title |
Sustainability |
container_volume |
14 |
container_issue |
19 |
container_start_page |
12272 |
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1774721873245896704 |