Creep Characteristic Test and Creep Model of Frozen Soil
In order to research the creep deformation characteristics of frozen soil and the effect of various influencing factors on creep, indoor uniaxial creep tests were carried out on frozen soil specimens at temperatures of −5, −4, −3 and −2 °C under loads of 0.25, 0.5, and 0.75 σt, respectively. The cre...
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ftmdpi:oai:mdpi.com:/2071-1050/15/5/3984/ 2023-08-20T04:07:07+02:00 Creep Characteristic Test and Creep Model of Frozen Soil Yawu Shao Yonglu Suo Jiang Xiao Yuan Bai Tao Yang agris 2023-02-22 application/pdf https://doi.org/10.3390/su15053984 EN eng Multidisciplinary Digital Publishing Institute Hazards and Sustainability https://dx.doi.org/10.3390/su15053984 https://creativecommons.org/licenses/by/4.0/ Sustainability; Volume 15; Issue 5; Pages: 3984 frozen soil creep properties decay creep creep constitutive equation Text 2023 ftmdpi https://doi.org/10.3390/su15053984 2023-08-01T08:56:18Z In order to research the creep deformation characteristics of frozen soil and the effect of various influencing factors on creep, indoor uniaxial creep tests were carried out on frozen soil specimens at temperatures of −5, −4, −3 and −2 °C under loads of 0.25, 0.5, and 0.75 σt, respectively. The creep deformation characteristics of frozen soil under different temperatures and load conditions are analyzed under unconfined conditions. The results show that under the uniaxial creep test conditions, when the load is low, there is no accelerated creep stage in the creep curve, which belongs to the decaying type creep; when the load is 0.75 σt, the creep curve enters the stage of accelerated creep, and the creep turns non-attenuated; temperature is the most important external factor affecting permafrost soil creep, and the proportion of ice is the key internal factor for affecting permafrost soil creep, the temperature is negatively correlated with the proportion of ice and the sensitivity of creep rate to temperature and load increases with the decrease of the proportion of ice; the damage variable D is introduced to modify the creep constitutive equation of the frozen soil, the creep process of frozen soil is well described by the modified creep constitutive equation for frozen soil. Text Ice permafrost MDPI Open Access Publishing Sustainability 15 5 3984 |
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frozen soil creep properties decay creep creep constitutive equation |
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frozen soil creep properties decay creep creep constitutive equation Yawu Shao Yonglu Suo Jiang Xiao Yuan Bai Tao Yang Creep Characteristic Test and Creep Model of Frozen Soil |
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frozen soil creep properties decay creep creep constitutive equation |
description |
In order to research the creep deformation characteristics of frozen soil and the effect of various influencing factors on creep, indoor uniaxial creep tests were carried out on frozen soil specimens at temperatures of −5, −4, −3 and −2 °C under loads of 0.25, 0.5, and 0.75 σt, respectively. The creep deformation characteristics of frozen soil under different temperatures and load conditions are analyzed under unconfined conditions. The results show that under the uniaxial creep test conditions, when the load is low, there is no accelerated creep stage in the creep curve, which belongs to the decaying type creep; when the load is 0.75 σt, the creep curve enters the stage of accelerated creep, and the creep turns non-attenuated; temperature is the most important external factor affecting permafrost soil creep, and the proportion of ice is the key internal factor for affecting permafrost soil creep, the temperature is negatively correlated with the proportion of ice and the sensitivity of creep rate to temperature and load increases with the decrease of the proportion of ice; the damage variable D is introduced to modify the creep constitutive equation of the frozen soil, the creep process of frozen soil is well described by the modified creep constitutive equation for frozen soil. |
format |
Text |
author |
Yawu Shao Yonglu Suo Jiang Xiao Yuan Bai Tao Yang |
author_facet |
Yawu Shao Yonglu Suo Jiang Xiao Yuan Bai Tao Yang |
author_sort |
Yawu Shao |
title |
Creep Characteristic Test and Creep Model of Frozen Soil |
title_short |
Creep Characteristic Test and Creep Model of Frozen Soil |
title_full |
Creep Characteristic Test and Creep Model of Frozen Soil |
title_fullStr |
Creep Characteristic Test and Creep Model of Frozen Soil |
title_full_unstemmed |
Creep Characteristic Test and Creep Model of Frozen Soil |
title_sort |
creep characteristic test and creep model of frozen soil |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/su15053984 |
op_coverage |
agris |
genre |
Ice permafrost |
genre_facet |
Ice permafrost |
op_source |
Sustainability; Volume 15; Issue 5; Pages: 3984 |
op_relation |
Hazards and Sustainability https://dx.doi.org/10.3390/su15053984 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/su15053984 |
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Sustainability |
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15 |
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5 |
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3984 |
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1774718573018611712 |