Degradation characteristics and bearing capacity model of pile in degraded permafrost
Global warming has led to increasing pile foundation deterioration in permafrost regions. Theoretical analysis and indoor model tests were used to analyse variations in the shaft resistance and ultimate bearing capacity (UBC) for various permafrost active-layer thicknesses (Z a ). A relationship for...
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Online Access: | http://dx.doi.org/10.1680/jgeen.20.00014 https://www.icevirtuallibrary.com/doi/pdf/10.1680/jgeen.20.00014 |
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crtelford:10.1680/jgeen.20.00014 2024-04-28T08:35:44+00:00 Degradation characteristics and bearing capacity model of pile in degraded permafrost Tang, Liyun Yang, Liujun Qiu, Peiyong Jia, Hailiang Zhang, Huimei Li, Guoyu 2022 http://dx.doi.org/10.1680/jgeen.20.00014 https://www.icevirtuallibrary.com/doi/pdf/10.1680/jgeen.20.00014 en eng Thomas Telford Ltd. Proceedings of the Institution of Civil Engineers - Geotechnical Engineering volume 175, issue 4, page 414-425 ISSN 1353-2618 1751-8563 Earth and Planetary Sciences (miscellaneous) Geotechnical Engineering and Engineering Geology journal-article 2022 crtelford https://doi.org/10.1680/jgeen.20.00014 2024-04-09T08:21:28Z Global warming has led to increasing pile foundation deterioration in permafrost regions. Theoretical analysis and indoor model tests were used to analyse variations in the shaft resistance and ultimate bearing capacity (UBC) for various permafrost active-layer thicknesses (Z a ). A relationship for atmospheric temperature, Z a and ground temperature was developed. The equivalent adfreezing force was used as an index to evaluate the degradation of pile foundation bearing behaviour and a theoretical model was established. Based on the theoretical degradation model and indoor experimental data, a model was established to reflect the deterioration of pile foundation bearing behaviour in warm permafrost regions. The model was verified using numerical simulations. The results showed that shaft resistance at the ultimate state can be divided into three stages (stable change, rapid increase and attenuation). The depth of the maximum values decreased from −0.40 m to −0.65 m with an increase in Z a . The pile head load (Q) against pile head settlement (S) curves were divided into three stages (elastic stage, elastic–plastic and plastic). A greater Z a made the plastic stage of the Q–S relationship occur earlier, resulting in a gradual decrease in UBC. The degradation variable (D) of bearing behaviour showed rapidly and then slowly increasing deterioration. This study provides experimental support for clarifying the degradation mechanism of pile foundation bearing behaviour and a degradation model to consider and quantify the impact of climate change on pile foundations in degraded permafrost. Article in Journal/Newspaper permafrost ICE Virtual Library (ICE Publishing) Proceedings of the Institution of Civil Engineers - Geotechnical Engineering 1 44 |
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Open Polar |
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ICE Virtual Library (ICE Publishing) |
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crtelford |
language |
English |
topic |
Earth and Planetary Sciences (miscellaneous) Geotechnical Engineering and Engineering Geology |
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Earth and Planetary Sciences (miscellaneous) Geotechnical Engineering and Engineering Geology Tang, Liyun Yang, Liujun Qiu, Peiyong Jia, Hailiang Zhang, Huimei Li, Guoyu Degradation characteristics and bearing capacity model of pile in degraded permafrost |
topic_facet |
Earth and Planetary Sciences (miscellaneous) Geotechnical Engineering and Engineering Geology |
description |
Global warming has led to increasing pile foundation deterioration in permafrost regions. Theoretical analysis and indoor model tests were used to analyse variations in the shaft resistance and ultimate bearing capacity (UBC) for various permafrost active-layer thicknesses (Z a ). A relationship for atmospheric temperature, Z a and ground temperature was developed. The equivalent adfreezing force was used as an index to evaluate the degradation of pile foundation bearing behaviour and a theoretical model was established. Based on the theoretical degradation model and indoor experimental data, a model was established to reflect the deterioration of pile foundation bearing behaviour in warm permafrost regions. The model was verified using numerical simulations. The results showed that shaft resistance at the ultimate state can be divided into three stages (stable change, rapid increase and attenuation). The depth of the maximum values decreased from −0.40 m to −0.65 m with an increase in Z a . The pile head load (Q) against pile head settlement (S) curves were divided into three stages (elastic stage, elastic–plastic and plastic). A greater Z a made the plastic stage of the Q–S relationship occur earlier, resulting in a gradual decrease in UBC. The degradation variable (D) of bearing behaviour showed rapidly and then slowly increasing deterioration. This study provides experimental support for clarifying the degradation mechanism of pile foundation bearing behaviour and a degradation model to consider and quantify the impact of climate change on pile foundations in degraded permafrost. |
format |
Article in Journal/Newspaper |
author |
Tang, Liyun Yang, Liujun Qiu, Peiyong Jia, Hailiang Zhang, Huimei Li, Guoyu |
author_facet |
Tang, Liyun Yang, Liujun Qiu, Peiyong Jia, Hailiang Zhang, Huimei Li, Guoyu |
author_sort |
Tang, Liyun |
title |
Degradation characteristics and bearing capacity model of pile in degraded permafrost |
title_short |
Degradation characteristics and bearing capacity model of pile in degraded permafrost |
title_full |
Degradation characteristics and bearing capacity model of pile in degraded permafrost |
title_fullStr |
Degradation characteristics and bearing capacity model of pile in degraded permafrost |
title_full_unstemmed |
Degradation characteristics and bearing capacity model of pile in degraded permafrost |
title_sort |
degradation characteristics and bearing capacity model of pile in degraded permafrost |
publisher |
Thomas Telford Ltd. |
publishDate |
2022 |
url |
http://dx.doi.org/10.1680/jgeen.20.00014 https://www.icevirtuallibrary.com/doi/pdf/10.1680/jgeen.20.00014 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
Proceedings of the Institution of Civil Engineers - Geotechnical Engineering volume 175, issue 4, page 414-425 ISSN 1353-2618 1751-8563 |
op_doi |
https://doi.org/10.1680/jgeen.20.00014 |
container_title |
Proceedings of the Institution of Civil Engineers - Geotechnical Engineering |
container_start_page |
1 |
op_container_end_page |
44 |
_version_ |
1797567744766377984 |