Numerical optimization on differential adjusting measures for asymmetrical degenerated warm permafrost railway embankment
Affected by climate warming and shady–sunny slope effect, the permafrost foundation under the railway is undergoing a significant asymmetric degradation process; research on the corresponding regulating or strengthening measures is urgently needed. Based on a well developed of numerical model, we an...
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ftdoajarticles:oai:doaj.org/article:e06cf7fcff6d4c13a6b7a90bfd02204d 2023-08-20T04:09:11+02:00 Numerical optimization on differential adjusting measures for asymmetrical degenerated warm permafrost railway embankment Yan-Dong Hou Wen-Yuan Lei Shu-Hao Liang Ming-Li Zhang Feng-Xi Zhou 2023-06-01T00:00:00Z https://doi.org/10.1016/j.accre.2023.05.007 https://doaj.org/article/e06cf7fcff6d4c13a6b7a90bfd02204d EN eng KeAi Communications Co., Ltd. http://www.sciencedirect.com/science/article/pii/S1674927823000679 https://doaj.org/toc/1674-9278 1674-9278 doi:10.1016/j.accre.2023.05.007 https://doaj.org/article/e06cf7fcff6d4c13a6b7a90bfd02204d Advances in Climate Change Research, Vol 14, Iss 3, Pp 479-491 (2023) Asymmetric degradation Crushed rock revetment Thermal insulation materials TPCT Reinforcement Meteorology. Climatology QC851-999 Social sciences (General) H1-99 article 2023 ftdoajarticles https://doi.org/10.1016/j.accre.2023.05.007 2023-07-30T00:34:03Z Affected by climate warming and shady–sunny slope effect, the permafrost foundation under the railway is undergoing a significant asymmetric degradation process; research on the corresponding regulating or strengthening measures is urgently needed. Based on a well developed of numerical model, we analyzed the ‘thermal repair’ effect of three redesigned differential thermal reinforcement on the partially degraded permafrost embankment with steps. The results show that, when used as a strengthening measure, the method of laying crushed rock revetment (CRR) with different thicknesses on the sunny and shady slopes cannot completely eliminate the residual warm permafrost regions formed in the previous thermal erosion. When the TCRR scheme is adopted for reinforcement, although horizontal region from the evaporation section of thermosyphones (TPCTs) to the right side of the embankment is remarkably cooled, permafrost under the sunny slope is still deteriorating. In the long run, both ETCRR and TCECRR reinforcement schemes can produce a large range of ‘cold core’ right below the whole embankment. However, from the perspective of the simultaneous functioning range and cold storage capacity, the TCECRR scheme is signally more efficient. The thermal insulation materials in the above composite strengthening measures can not only resist the heat input in the warm season, but also improve their working efficiency by maintaining the temperature difference between the evaporation section of the heat pipe and the external environment in cold season. The addition of crushed rock revetment in TCECRR has played its thermal semiconductor effect and further improved the comprehensive thermal repair efficiency of the composite measures. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Advances in Climate Change Research 14 3 479 491 |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Asymmetric degradation Crushed rock revetment Thermal insulation materials TPCT Reinforcement Meteorology. Climatology QC851-999 Social sciences (General) H1-99 |
spellingShingle |
Asymmetric degradation Crushed rock revetment Thermal insulation materials TPCT Reinforcement Meteorology. Climatology QC851-999 Social sciences (General) H1-99 Yan-Dong Hou Wen-Yuan Lei Shu-Hao Liang Ming-Li Zhang Feng-Xi Zhou Numerical optimization on differential adjusting measures for asymmetrical degenerated warm permafrost railway embankment |
topic_facet |
Asymmetric degradation Crushed rock revetment Thermal insulation materials TPCT Reinforcement Meteorology. Climatology QC851-999 Social sciences (General) H1-99 |
description |
Affected by climate warming and shady–sunny slope effect, the permafrost foundation under the railway is undergoing a significant asymmetric degradation process; research on the corresponding regulating or strengthening measures is urgently needed. Based on a well developed of numerical model, we analyzed the ‘thermal repair’ effect of three redesigned differential thermal reinforcement on the partially degraded permafrost embankment with steps. The results show that, when used as a strengthening measure, the method of laying crushed rock revetment (CRR) with different thicknesses on the sunny and shady slopes cannot completely eliminate the residual warm permafrost regions formed in the previous thermal erosion. When the TCRR scheme is adopted for reinforcement, although horizontal region from the evaporation section of thermosyphones (TPCTs) to the right side of the embankment is remarkably cooled, permafrost under the sunny slope is still deteriorating. In the long run, both ETCRR and TCECRR reinforcement schemes can produce a large range of ‘cold core’ right below the whole embankment. However, from the perspective of the simultaneous functioning range and cold storage capacity, the TCECRR scheme is signally more efficient. The thermal insulation materials in the above composite strengthening measures can not only resist the heat input in the warm season, but also improve their working efficiency by maintaining the temperature difference between the evaporation section of the heat pipe and the external environment in cold season. The addition of crushed rock revetment in TCECRR has played its thermal semiconductor effect and further improved the comprehensive thermal repair efficiency of the composite measures. |
format |
Article in Journal/Newspaper |
author |
Yan-Dong Hou Wen-Yuan Lei Shu-Hao Liang Ming-Li Zhang Feng-Xi Zhou |
author_facet |
Yan-Dong Hou Wen-Yuan Lei Shu-Hao Liang Ming-Li Zhang Feng-Xi Zhou |
author_sort |
Yan-Dong Hou |
title |
Numerical optimization on differential adjusting measures for asymmetrical degenerated warm permafrost railway embankment |
title_short |
Numerical optimization on differential adjusting measures for asymmetrical degenerated warm permafrost railway embankment |
title_full |
Numerical optimization on differential adjusting measures for asymmetrical degenerated warm permafrost railway embankment |
title_fullStr |
Numerical optimization on differential adjusting measures for asymmetrical degenerated warm permafrost railway embankment |
title_full_unstemmed |
Numerical optimization on differential adjusting measures for asymmetrical degenerated warm permafrost railway embankment |
title_sort |
numerical optimization on differential adjusting measures for asymmetrical degenerated warm permafrost railway embankment |
publisher |
KeAi Communications Co., Ltd. |
publishDate |
2023 |
url |
https://doi.org/10.1016/j.accre.2023.05.007 https://doaj.org/article/e06cf7fcff6d4c13a6b7a90bfd02204d |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Advances in Climate Change Research, Vol 14, Iss 3, Pp 479-491 (2023) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S1674927823000679 https://doaj.org/toc/1674-9278 1674-9278 doi:10.1016/j.accre.2023.05.007 https://doaj.org/article/e06cf7fcff6d4c13a6b7a90bfd02204d |
op_doi |
https://doi.org/10.1016/j.accre.2023.05.007 |
container_title |
Advances in Climate Change Research |
container_volume |
14 |
container_issue |
3 |
container_start_page |
479 |
op_container_end_page |
491 |
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1774721965798457344 |