Experimental Study of Stress-Seepage Coupling Properties of Sandstone under Different Loading Paths
The study on hydromechanical coupling properties of rocks is of great importance for rock engineering. It is closely related to the stability analysis of structures in rocks under seepage condition. In this study, a series of conventional triaxial tests under drained condition and hydrostatic compre...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/4955017 |
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| _version_ | 1832549184425689088 |
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| author | Xi Chen Wei Wang Yajun Cao Qizhi Zhu Weiya Xu Huaining Ruan |
| author_facet | Xi Chen Wei Wang Yajun Cao Qizhi Zhu Weiya Xu Huaining Ruan |
| author_sort | Xi Chen |
| collection | DOAJ |
| description | The study on hydromechanical coupling properties of rocks is of great importance for rock engineering. It is closely related to the stability analysis of structures in rocks under seepage condition. In this study, a series of conventional triaxial tests under drained condition and hydrostatic compression tests under drained or undrained condition on sandstones were conducted. Moreover, complex cyclic loading and unloading tests were also carried out. Based on the experimental results, the following conclusions were obtained. For conventional triaxial tests, the elastic modulus, peak strength, crack initiation stress, and expansion stress increase with increased confining pressure. Pore pressure weakened the effect of the confining pressure under drained condition, which led to a decline in rock mechanical properties. It appeared that cohesion was more sensitive to pore pressure than to the internal friction angle. For complex loading and unloading cyclic tests, in deviatoric stress loading and unloading cycles, elastic modulus increased obviously in first loading stage and increased slowly in next stages. In confining pressure loading and unloading cycles, the Biot coefficient decreased first and then increased, which indicates that damage has a great impact on the Biot coefficient. |
| format | Article |
| id | doaj-art-9f06cfe8226a4d99acf4e93188ae863e |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-9f06cfe8226a4d99acf4e93188ae863e2025-02-03T06:11:58ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/49550174955017Experimental Study of Stress-Seepage Coupling Properties of Sandstone under Different Loading PathsXi Chen0Wei Wang1Yajun Cao2Qizhi Zhu3Weiya Xu4Huaining Ruan5Geotechnical Research Institute, Hohai University, Nanjing, Jiangsu 210098, ChinaGeotechnical Research Institute, Hohai University, Nanjing, Jiangsu 210098, ChinaGeotechnical Research Institute, Hohai University, Nanjing, Jiangsu 210098, ChinaGeotechnical Research Institute, Hohai University, Nanjing, Jiangsu 210098, ChinaGeotechnical Research Institute, Hohai University, Nanjing, Jiangsu 210098, ChinaGeotechnical Research Institute, Hohai University, Nanjing, Jiangsu 210098, ChinaThe study on hydromechanical coupling properties of rocks is of great importance for rock engineering. It is closely related to the stability analysis of structures in rocks under seepage condition. In this study, a series of conventional triaxial tests under drained condition and hydrostatic compression tests under drained or undrained condition on sandstones were conducted. Moreover, complex cyclic loading and unloading tests were also carried out. Based on the experimental results, the following conclusions were obtained. For conventional triaxial tests, the elastic modulus, peak strength, crack initiation stress, and expansion stress increase with increased confining pressure. Pore pressure weakened the effect of the confining pressure under drained condition, which led to a decline in rock mechanical properties. It appeared that cohesion was more sensitive to pore pressure than to the internal friction angle. For complex loading and unloading cyclic tests, in deviatoric stress loading and unloading cycles, elastic modulus increased obviously in first loading stage and increased slowly in next stages. In confining pressure loading and unloading cycles, the Biot coefficient decreased first and then increased, which indicates that damage has a great impact on the Biot coefficient.http://dx.doi.org/10.1155/2021/4955017 |
| spellingShingle | Xi Chen Wei Wang Yajun Cao Qizhi Zhu Weiya Xu Huaining Ruan Experimental Study of Stress-Seepage Coupling Properties of Sandstone under Different Loading Paths Geofluids |
| title | Experimental Study of Stress-Seepage Coupling Properties of Sandstone under Different Loading Paths |
| title_full | Experimental Study of Stress-Seepage Coupling Properties of Sandstone under Different Loading Paths |
| title_fullStr | Experimental Study of Stress-Seepage Coupling Properties of Sandstone under Different Loading Paths |
| title_full_unstemmed | Experimental Study of Stress-Seepage Coupling Properties of Sandstone under Different Loading Paths |
| title_short | Experimental Study of Stress-Seepage Coupling Properties of Sandstone under Different Loading Paths |
| title_sort | experimental study of stress seepage coupling properties of sandstone under different loading paths |
| url | http://dx.doi.org/10.1155/2021/4955017 |
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