Experimental Study on Seepage Anisotropy of a Hexagonal Columnar Jointed Rock Mass
Many columnar jointed rock masses (basalt) are present at the Baihetan hydropower dam site, and their seepage characteristics have a significant impact on the project’s safety and stability. In this study, model samples consisting of material similar to the columnar jointed rock mass with different...
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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: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/6661741 |
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| _version_ | 1832554971408629760 |
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| author | Yanxin He Zhende Zhu Wenbin Lu Yuan Tian Xinghua Xie Sijing Wang |
| author_facet | Yanxin He Zhende Zhu Wenbin Lu Yuan Tian Xinghua Xie Sijing Wang |
| author_sort | Yanxin He |
| collection | DOAJ |
| description | Many columnar jointed rock masses (basalt) are present at the Baihetan hydropower dam site, and their seepage characteristics have a significant impact on the project’s safety and stability. In this study, model samples consisting of material similar to the columnar jointed rock mass with different inclination angles (0°–90°) were prepared and laboratory triaxial seepage tests were performed to study the seepage characteristics of the columnar jointed rock mass under maximum axial principal stress. The experimental results showed that the similar material model samples of columnar jointed rock mass showed obvious seepage anisotropy. The nonlinear seepage characteristics were well described by the Forchheimer and Izbash equations, and the fitting coefficients of the two equations were in good correspondence. The curves describing the relationship between the inherent permeability and the stress of the samples with different dip angles were U-shaped and L-shaped, and a one-variable cubic equation well described the relationship. The 45° angle specimen had the highest sensitivity to the maximum principal stress, and its final permeability increased by 144.25% compared with the initial permeability. The research results can provide theoretical support for the stability evaluation of the Baihetan hydropower station. |
| format | Article |
| id | doaj-art-ad10c78ca582424abd02f3ee2cd85c8c |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-ad10c78ca582424abd02f3ee2cd85c8c2025-02-03T05:49:55ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66617416661741Experimental Study on Seepage Anisotropy of a Hexagonal Columnar Jointed Rock MassYanxin He0Zhende Zhu1Wenbin Lu2Yuan Tian3Xinghua Xie4Sijing Wang5Key Laboratory of Ministry of Education of Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education of Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education of Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaKey Laboratory of Ministry of Education of Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaNanjing Hydraulic Research Institute, Nanjing 210029, ChinaKey Laboratory of Ministry of Education of Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, ChinaMany columnar jointed rock masses (basalt) are present at the Baihetan hydropower dam site, and their seepage characteristics have a significant impact on the project’s safety and stability. In this study, model samples consisting of material similar to the columnar jointed rock mass with different inclination angles (0°–90°) were prepared and laboratory triaxial seepage tests were performed to study the seepage characteristics of the columnar jointed rock mass under maximum axial principal stress. The experimental results showed that the similar material model samples of columnar jointed rock mass showed obvious seepage anisotropy. The nonlinear seepage characteristics were well described by the Forchheimer and Izbash equations, and the fitting coefficients of the two equations were in good correspondence. The curves describing the relationship between the inherent permeability and the stress of the samples with different dip angles were U-shaped and L-shaped, and a one-variable cubic equation well described the relationship. The 45° angle specimen had the highest sensitivity to the maximum principal stress, and its final permeability increased by 144.25% compared with the initial permeability. The research results can provide theoretical support for the stability evaluation of the Baihetan hydropower station.http://dx.doi.org/10.1155/2021/6661741 |
| spellingShingle | Yanxin He Zhende Zhu Wenbin Lu Yuan Tian Xinghua Xie Sijing Wang Experimental Study on Seepage Anisotropy of a Hexagonal Columnar Jointed Rock Mass Shock and Vibration |
| title | Experimental Study on Seepage Anisotropy of a Hexagonal Columnar Jointed Rock Mass |
| title_full | Experimental Study on Seepage Anisotropy of a Hexagonal Columnar Jointed Rock Mass |
| title_fullStr | Experimental Study on Seepage Anisotropy of a Hexagonal Columnar Jointed Rock Mass |
| title_full_unstemmed | Experimental Study on Seepage Anisotropy of a Hexagonal Columnar Jointed Rock Mass |
| title_short | Experimental Study on Seepage Anisotropy of a Hexagonal Columnar Jointed Rock Mass |
| title_sort | experimental study on seepage anisotropy of a hexagonal columnar jointed rock mass |
| url | http://dx.doi.org/10.1155/2021/6661741 |
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