Field forensic and numerical investigation of thermal stability of a permafrost-protecting granular embankment structure of asphalt-pavement expressways in cold regions
The traditional crushed-rock embankment (CRE) has proven to be one of the most successful cooling embankment structures during the operation of Qinghai-Tibet Railway. However, it remains untested whether or not traditional CRE can maintain stability of permafrost foundation under expressways under s...
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ftdoajarticles:oai:doaj.org/article:40e0e8bc212e47dbbcd951029753f50b 2023-11-12T04:24:23+01:00 Field forensic and numerical investigation of thermal stability of a permafrost-protecting granular embankment structure of asphalt-pavement expressways in cold regions Bowen Tai Qingbai Wu Guoqing Chen 2023-11-01T00:00:00Z https://doi.org/10.1016/j.csite.2023.103610 https://doaj.org/article/40e0e8bc212e47dbbcd951029753f50b EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2214157X23009164 https://doaj.org/toc/2214-157X 2214-157X doi:10.1016/j.csite.2023.103610 https://doaj.org/article/40e0e8bc212e47dbbcd951029753f50b Case Studies in Thermal Engineering, Vol 51, Iss , Pp 103610- (2023) Crushed-rock material Expressway Asphalt-pavement Thermal stability Permafrost Engineering (General). Civil engineering (General) TA1-2040 article 2023 ftdoajarticles https://doi.org/10.1016/j.csite.2023.103610 2023-10-22T00:42:10Z The traditional crushed-rock embankment (CRE) has proven to be one of the most successful cooling embankment structures during the operation of Qinghai-Tibet Railway. However, it remains untested whether or not traditional CRE can maintain stability of permafrost foundation under expressways under strong heat absorption of asphalt-pavement and climate warming. For the study, field tests were performed to evaluate cooling performance of traditional CRE in wider-width expressways. Then, A heat transfer model of the CRE was established, and a novel inverted “M”-shaped crushed-rock embankment (MCRE) was proposed. Finally, large numbers of numerical simulations were further performed to comparatively evaluate thermal behavior and cooling performances for both traditional CRE and novel MCRE in wider-width expressway construction. The study shows that (1) the expressway accelerates degradation rate of permafrost foundation under traditional CRE; (2) traditional CRE shows obvious sunny-shady slope effect, which cannot guarantee thermal stability of expressway; (3) the novel MCRE for the expressway increases the entry of cooling energy and therefore accelerates heat dissipation from the permafrost foundation; and (4) the novel MCRE improves long-term thermal stability of the expressway. The research could provide important technical reference for the construction of wider-width expressways in permafrost areas in the future. Article in Journal/Newspaper permafrost Directory of Open Access Journals: DOAJ Articles Case Studies in Thermal Engineering 51 103610 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Crushed-rock material Expressway Asphalt-pavement Thermal stability Permafrost Engineering (General). Civil engineering (General) TA1-2040 |
spellingShingle |
Crushed-rock material Expressway Asphalt-pavement Thermal stability Permafrost Engineering (General). Civil engineering (General) TA1-2040 Bowen Tai Qingbai Wu Guoqing Chen Field forensic and numerical investigation of thermal stability of a permafrost-protecting granular embankment structure of asphalt-pavement expressways in cold regions |
topic_facet |
Crushed-rock material Expressway Asphalt-pavement Thermal stability Permafrost Engineering (General). Civil engineering (General) TA1-2040 |
description |
The traditional crushed-rock embankment (CRE) has proven to be one of the most successful cooling embankment structures during the operation of Qinghai-Tibet Railway. However, it remains untested whether or not traditional CRE can maintain stability of permafrost foundation under expressways under strong heat absorption of asphalt-pavement and climate warming. For the study, field tests were performed to evaluate cooling performance of traditional CRE in wider-width expressways. Then, A heat transfer model of the CRE was established, and a novel inverted “M”-shaped crushed-rock embankment (MCRE) was proposed. Finally, large numbers of numerical simulations were further performed to comparatively evaluate thermal behavior and cooling performances for both traditional CRE and novel MCRE in wider-width expressway construction. The study shows that (1) the expressway accelerates degradation rate of permafrost foundation under traditional CRE; (2) traditional CRE shows obvious sunny-shady slope effect, which cannot guarantee thermal stability of expressway; (3) the novel MCRE for the expressway increases the entry of cooling energy and therefore accelerates heat dissipation from the permafrost foundation; and (4) the novel MCRE improves long-term thermal stability of the expressway. The research could provide important technical reference for the construction of wider-width expressways in permafrost areas in the future. |
format |
Article in Journal/Newspaper |
author |
Bowen Tai Qingbai Wu Guoqing Chen |
author_facet |
Bowen Tai Qingbai Wu Guoqing Chen |
author_sort |
Bowen Tai |
title |
Field forensic and numerical investigation of thermal stability of a permafrost-protecting granular embankment structure of asphalt-pavement expressways in cold regions |
title_short |
Field forensic and numerical investigation of thermal stability of a permafrost-protecting granular embankment structure of asphalt-pavement expressways in cold regions |
title_full |
Field forensic and numerical investigation of thermal stability of a permafrost-protecting granular embankment structure of asphalt-pavement expressways in cold regions |
title_fullStr |
Field forensic and numerical investigation of thermal stability of a permafrost-protecting granular embankment structure of asphalt-pavement expressways in cold regions |
title_full_unstemmed |
Field forensic and numerical investigation of thermal stability of a permafrost-protecting granular embankment structure of asphalt-pavement expressways in cold regions |
title_sort |
field forensic and numerical investigation of thermal stability of a permafrost-protecting granular embankment structure of asphalt-pavement expressways in cold regions |
publisher |
Elsevier |
publishDate |
2023 |
url |
https://doi.org/10.1016/j.csite.2023.103610 https://doaj.org/article/40e0e8bc212e47dbbcd951029753f50b |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Case Studies in Thermal Engineering, Vol 51, Iss , Pp 103610- (2023) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2214157X23009164 https://doaj.org/toc/2214-157X 2214-157X doi:10.1016/j.csite.2023.103610 https://doaj.org/article/40e0e8bc212e47dbbcd951029753f50b |
op_doi |
https://doi.org/10.1016/j.csite.2023.103610 |
container_title |
Case Studies in Thermal Engineering |
container_volume |
51 |
container_start_page |
103610 |
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1782338891247779840 |