Mechanical properties of pressure-frozen ice under triaxial compressive stress
Artificial ground freezing is an effective method for underground constructions in deep alluvium. To study the compressive strength of frozen soil under high ground pressure and high hydraulic pressure, it is necessary to understand the mechanical behaviour of ice that is formed under triaxial compr...
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Cambridge University Press
2024-01-01
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| Series: | Journal of Glaciology |
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| Online Access: | https://www.cambridge.org/core/product/identifier/S0022143024000595/type/journal_article |
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| author | Peixin Sun Weihao Yang Jukka Tuhkuri |
| author_facet | Peixin Sun Weihao Yang Jukka Tuhkuri |
| author_sort | Peixin Sun |
| collection | DOAJ |
| description | Artificial ground freezing is an effective method for underground constructions in deep alluvium. To study the compressive strength of frozen soil under high ground pressure and high hydraulic pressure, it is necessary to understand the mechanical behaviour of ice that is formed under triaxial compressive stress. A low-temperature triaxial test system was developed and used to study both formation and deformation of columnar ice under hydrostatic pressure. Cylindrical ice specimens 125 mm in height and 61.8 mm in diameter were prepared and tested under constant strain rates. At a strain rate of 5 × 10−5 s−1, the peak axial stress showed a linear increase as the confining pressure increased from 2 to 30 MPa, while the peak deviatoric stress exhibited a slight decrease. At a confining pressure of 30 MPa, the peak deviatoric stress showed a logarithmic increase with the strain rate increasing from 5 × 10−6 to 5 × 10−4 s−1, and the failure strain nearly doubled. A power law relationship between the time to failure and the strain rate was also observed. In this study, each test consistently demonstrated a ductile failure mode, with a noticeable reduction in cracking as the confining pressure increased. Due to the effect of the high confining pressure, crack propagation was suppressed, and an apparent recrystallization after peak stress was observed. |
| format | Article |
| id | doaj-art-fa1045832b9c4428babe87a8883e9324 |
| institution | Kabale University |
| issn | 0022-1430 1727-5652 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Cambridge University Press |
| record_format | Article |
| series | Journal of Glaciology |
| spelling | doaj-art-fa1045832b9c4428babe87a8883e93242025-01-16T21:53:02ZengCambridge University PressJournal of Glaciology0022-14301727-56522024-01-017010.1017/jog.2024.59Mechanical properties of pressure-frozen ice under triaxial compressive stressPeixin Sun0https://orcid.org/0000-0001-6405-4348Weihao Yang1Jukka Tuhkuri2State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, China School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, ChinaDepartment of Mechanical Engineering, Aalto University, Espoo, FinlandArtificial ground freezing is an effective method for underground constructions in deep alluvium. To study the compressive strength of frozen soil under high ground pressure and high hydraulic pressure, it is necessary to understand the mechanical behaviour of ice that is formed under triaxial compressive stress. A low-temperature triaxial test system was developed and used to study both formation and deformation of columnar ice under hydrostatic pressure. Cylindrical ice specimens 125 mm in height and 61.8 mm in diameter were prepared and tested under constant strain rates. At a strain rate of 5 × 10−5 s−1, the peak axial stress showed a linear increase as the confining pressure increased from 2 to 30 MPa, while the peak deviatoric stress exhibited a slight decrease. At a confining pressure of 30 MPa, the peak deviatoric stress showed a logarithmic increase with the strain rate increasing from 5 × 10−6 to 5 × 10−4 s−1, and the failure strain nearly doubled. A power law relationship between the time to failure and the strain rate was also observed. In this study, each test consistently demonstrated a ductile failure mode, with a noticeable reduction in cracking as the confining pressure increased. Due to the effect of the high confining pressure, crack propagation was suppressed, and an apparent recrystallization after peak stress was observed.https://www.cambridge.org/core/product/identifier/S0022143024000595/type/journal_articlecrackingicepressure-frozen icestrength of icetriaxial compressive test |
| spellingShingle | Peixin Sun Weihao Yang Jukka Tuhkuri Mechanical properties of pressure-frozen ice under triaxial compressive stress Journal of Glaciology cracking ice pressure-frozen ice strength of ice triaxial compressive test |
| title | Mechanical properties of pressure-frozen ice under triaxial compressive stress |
| title_full | Mechanical properties of pressure-frozen ice under triaxial compressive stress |
| title_fullStr | Mechanical properties of pressure-frozen ice under triaxial compressive stress |
| title_full_unstemmed | Mechanical properties of pressure-frozen ice under triaxial compressive stress |
| title_short | Mechanical properties of pressure-frozen ice under triaxial compressive stress |
| title_sort | mechanical properties of pressure frozen ice under triaxial compressive stress |
| topic | cracking ice pressure-frozen ice strength of ice triaxial compressive test |
| url | https://www.cambridge.org/core/product/identifier/S0022143024000595/type/journal_article |
| work_keys_str_mv | AT peixinsun mechanicalpropertiesofpressurefrozeniceundertriaxialcompressivestress AT weihaoyang mechanicalpropertiesofpressurefrozeniceundertriaxialcompressivestress AT jukkatuhkuri mechanicalpropertiesofpressurefrozeniceundertriaxialcompressivestress |