Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression
Abstract Understanding the mechanical properties of frozen flawed rock masses is fundamental to conducting safe rock engineering in frozen rock strata. However, there has been scarce research in this area, especially on key issues such as the strength and deformability of frozen flawed rock masses a...
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crwiley:10.1002/ppp.2142 2024-06-23T07:56:10+00:00 Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression Jia, Hai‐liang Han, Li Zhao, Tao Sun, Qiang Tan, Xian‐jun National Natural Science Foundation of China Youth Innovation Promotion Association of the Chinese Academy of Sciences National Outstanding Youth Science Fund Project of National Natural Science Foundation of China 2022 http://dx.doi.org/10.1002/ppp.2142 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2142 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2142 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Permafrost and Periglacial Processes volume 33, issue 2, page 160-175 ISSN 1045-6740 1099-1530 journal-article 2022 crwiley https://doi.org/10.1002/ppp.2142 2024-06-11T04:49:43Z Abstract Understanding the mechanical properties of frozen flawed rock masses is fundamental to conducting safe rock engineering in frozen rock strata. However, there has been scarce research in this area, especially on key issues such as the strength and deformability of frozen flawed rock masses and failure processes under load. In this paper, frozen flawed sandstone was subjected to uniaxial compression and the cracking process was observed. The influences of flaw inclination angle and freezing temperature on the strength and cracking behavior of frozen flawed sandstone under load were determined. The results show that: (a) the strength of frozen flawed sandstone increases with increases in flaw inclination and decreases in temperature; (b) the flaw inclination has a dramatic influence on both the crack coalescence behavior and the final failure form of frozen flawed samples under compression; and (c) the significant influence of freezing temperature on the cracking behavior of frozen flawed sandstone is caused by the interaction between flaw ice and its surrounding rock. Strengthening of flawed sandstone by freezing results because (i) pore ice provides support and cohesion at the pore scale, while (ii) at the crack scale ice can support the flaw and resist its deformation during compression, and cementation of the ice–rock interface provides normal and tangential cracking resistance. Article in Journal/Newspaper Permafrost and Periglacial Processes Wiley Online Library Permafrost and Periglacial Processes |
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English |
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Abstract Understanding the mechanical properties of frozen flawed rock masses is fundamental to conducting safe rock engineering in frozen rock strata. However, there has been scarce research in this area, especially on key issues such as the strength and deformability of frozen flawed rock masses and failure processes under load. In this paper, frozen flawed sandstone was subjected to uniaxial compression and the cracking process was observed. The influences of flaw inclination angle and freezing temperature on the strength and cracking behavior of frozen flawed sandstone under load were determined. The results show that: (a) the strength of frozen flawed sandstone increases with increases in flaw inclination and decreases in temperature; (b) the flaw inclination has a dramatic influence on both the crack coalescence behavior and the final failure form of frozen flawed samples under compression; and (c) the significant influence of freezing temperature on the cracking behavior of frozen flawed sandstone is caused by the interaction between flaw ice and its surrounding rock. Strengthening of flawed sandstone by freezing results because (i) pore ice provides support and cohesion at the pore scale, while (ii) at the crack scale ice can support the flaw and resist its deformation during compression, and cementation of the ice–rock interface provides normal and tangential cracking resistance. |
author2 |
National Natural Science Foundation of China Youth Innovation Promotion Association of the Chinese Academy of Sciences National Outstanding Youth Science Fund Project of National Natural Science Foundation of China |
format |
Article in Journal/Newspaper |
author |
Jia, Hai‐liang Han, Li Zhao, Tao Sun, Qiang Tan, Xian‐jun |
spellingShingle |
Jia, Hai‐liang Han, Li Zhao, Tao Sun, Qiang Tan, Xian‐jun Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression |
author_facet |
Jia, Hai‐liang Han, Li Zhao, Tao Sun, Qiang Tan, Xian‐jun |
author_sort |
Jia, Hai‐liang |
title |
Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression |
title_short |
Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression |
title_full |
Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression |
title_fullStr |
Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression |
title_full_unstemmed |
Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression |
title_sort |
strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/ppp.2142 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ppp.2142 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ppp.2142 |
genre |
Permafrost and Periglacial Processes |
genre_facet |
Permafrost and Periglacial Processes |
op_source |
Permafrost and Periglacial Processes volume 33, issue 2, page 160-175 ISSN 1045-6740 1099-1530 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1002/ppp.2142 |
container_title |
Permafrost and Periglacial Processes |
_version_ |
1802649079193272320 |