Experimental Study on Key Design Parameters of Cast-in-situ Pile Foundation in Permafrost Regions
Abstract The freezing strength of pile foundation in contact with permafrost is the key parameter for calculating the bearing capacity and pull-out stability of foundation. The thermal physical parameters of concrete before initial setting under various conditions were measured by a thermal conducti...
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crioppubl:10.1088/1757-899x/585/1/012003 2024-06-02T08:13:01+00:00 Experimental Study on Key Design Parameters of Cast-in-situ Pile Foundation in Permafrost Regions Ji, Yanjun Hu, Yupu Jin, Long Luo, Tao 2019 http://dx.doi.org/10.1088/1757-899x/585/1/012003 https://iopscience.iop.org/article/10.1088/1757-899X/585/1/012003/pdf https://iopscience.iop.org/article/10.1088/1757-899X/585/1/012003 unknown IOP Publishing http://creativecommons.org/licenses/by/3.0/ https://iopscience.iop.org/info/page/text-and-data-mining IOP Conference Series: Materials Science and Engineering volume 585, issue 1, page 012003 ISSN 1757-8981 1757-899X journal-article 2019 crioppubl https://doi.org/10.1088/1757-899x/585/1/012003 2024-05-07T13:56:41Z Abstract The freezing strength of pile foundation in contact with permafrost is the key parameter for calculating the bearing capacity and pull-out stability of foundation. The thermal physical parameters of concrete before initial setting under various conditions were measured by a thermal conductivity meter based on the transient method. The effects of water binder ratio and pouring temperature on the thermal physical parameters were analyzed. The results show that the ratio of water to binder increases from 0.4 to 0.6, the thermal conductivity and thermal diffusivity decrease and the specific heat increases correspondingly; the thermal conductivity is negatively correlated with the pouring temperature, while the specific heat and thermal diffusivity are not significantly correlated with the pouring temperature. Based on the above research results, it is suggested that the water binder ratio of 0.4-0.45 and the pouring temperature of 5-10°C should be adopted in the design of cast-in-place piles in permafrost regions. Article in Journal/Newspaper permafrost IOP Publishing IOP Conference Series: Materials Science and Engineering 585 012003 |
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Abstract The freezing strength of pile foundation in contact with permafrost is the key parameter for calculating the bearing capacity and pull-out stability of foundation. The thermal physical parameters of concrete before initial setting under various conditions were measured by a thermal conductivity meter based on the transient method. The effects of water binder ratio and pouring temperature on the thermal physical parameters were analyzed. The results show that the ratio of water to binder increases from 0.4 to 0.6, the thermal conductivity and thermal diffusivity decrease and the specific heat increases correspondingly; the thermal conductivity is negatively correlated with the pouring temperature, while the specific heat and thermal diffusivity are not significantly correlated with the pouring temperature. Based on the above research results, it is suggested that the water binder ratio of 0.4-0.45 and the pouring temperature of 5-10°C should be adopted in the design of cast-in-place piles in permafrost regions. |
format |
Article in Journal/Newspaper |
author |
Ji, Yanjun Hu, Yupu Jin, Long Luo, Tao |
spellingShingle |
Ji, Yanjun Hu, Yupu Jin, Long Luo, Tao Experimental Study on Key Design Parameters of Cast-in-situ Pile Foundation in Permafrost Regions |
author_facet |
Ji, Yanjun Hu, Yupu Jin, Long Luo, Tao |
author_sort |
Ji, Yanjun |
title |
Experimental Study on Key Design Parameters of Cast-in-situ Pile Foundation in Permafrost Regions |
title_short |
Experimental Study on Key Design Parameters of Cast-in-situ Pile Foundation in Permafrost Regions |
title_full |
Experimental Study on Key Design Parameters of Cast-in-situ Pile Foundation in Permafrost Regions |
title_fullStr |
Experimental Study on Key Design Parameters of Cast-in-situ Pile Foundation in Permafrost Regions |
title_full_unstemmed |
Experimental Study on Key Design Parameters of Cast-in-situ Pile Foundation in Permafrost Regions |
title_sort |
experimental study on key design parameters of cast-in-situ pile foundation in permafrost regions |
publisher |
IOP Publishing |
publishDate |
2019 |
url |
http://dx.doi.org/10.1088/1757-899x/585/1/012003 https://iopscience.iop.org/article/10.1088/1757-899X/585/1/012003/pdf https://iopscience.iop.org/article/10.1088/1757-899X/585/1/012003 |
genre |
permafrost |
genre_facet |
permafrost |
op_source |
IOP Conference Series: Materials Science and Engineering volume 585, issue 1, page 012003 ISSN 1757-8981 1757-899X |
op_rights |
http://creativecommons.org/licenses/by/3.0/ https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1757-899x/585/1/012003 |
container_title |
IOP Conference Series: Materials Science and Engineering |
container_volume |
585 |
container_start_page |
012003 |
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1800759648897204224 |