Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale
Water-weakening effect is one of the most important factors inducing large deformation and stability problems of shale strata in the Huangjiazhai Tunnel. The influence of water on shale with various water contents and its mechanism still needs more study. In this paper, the X-ray diffraction and wat...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/5263431 |
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| author | Zhen Li Shangge Liu Wentao Ren Jinjin Fang Qinghua Zhu Zhilin Dun |
| author_facet | Zhen Li Shangge Liu Wentao Ren Jinjin Fang Qinghua Zhu Zhilin Dun |
| author_sort | Zhen Li |
| collection | DOAJ |
| description | Water-weakening effect is one of the most important factors inducing large deformation and stability problems of shale strata in the Huangjiazhai Tunnel. The influence of water on shale with various water contents and its mechanism still needs more study. In this paper, the X-ray diffraction and water absorption test were first conducted to determine the influence of mineral components on water-rock interaction. Then, a series of rock mechanical tests, including uniaxial compressive test, Brazilian disk test, and triaxial compressive test, were carried out on shale under dried condition, wetted condition with various water contents, and saturated condition. For the uniaxial compression, tension, and triaxial compression, the softening coefficient could reach 0.38, 0.63, and 0.52, respectively. Based on the macroscale experiments, a numerical case study of tunnel excavation was investigated to evaluate the water effect. Finally, with the aid of scanning electron microscope and failure morphology, the mechanism of water-weakening effect on shale was discussed from microscopic and macroscopic perspectives. The thickness of the double layer increases with the increase of water immersion time. This paper provides a set of useful data for reference in construction in shale strata, and a methodology to evaluate water-weakening effect through laboratory and numerical modelling approaches. |
| format | Article |
| id | doaj-art-1d4e8940da69415a8dfd0273086093ab |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-1d4e8940da69415a8dfd0273086093ab2025-02-03T01:30:31ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/52634315263431Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on ShaleZhen Li0Shangge Liu1Wentao Ren2Jinjin Fang3Qinghua Zhu4Zhilin Dun5School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaCCCC Second Highway Consultants Co., Ltd., Wuhan 430056, ChinaTangkou Coal Mining Company Ltd., Jining 272055, ChinaSchool of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Foreign Studies, Henan Polytechnic University, Jiaozuo 454003, ChinaSchool of Civil Engineering, Henan Polytechnic University, Jiaozuo 454003, ChinaWater-weakening effect is one of the most important factors inducing large deformation and stability problems of shale strata in the Huangjiazhai Tunnel. The influence of water on shale with various water contents and its mechanism still needs more study. In this paper, the X-ray diffraction and water absorption test were first conducted to determine the influence of mineral components on water-rock interaction. Then, a series of rock mechanical tests, including uniaxial compressive test, Brazilian disk test, and triaxial compressive test, were carried out on shale under dried condition, wetted condition with various water contents, and saturated condition. For the uniaxial compression, tension, and triaxial compression, the softening coefficient could reach 0.38, 0.63, and 0.52, respectively. Based on the macroscale experiments, a numerical case study of tunnel excavation was investigated to evaluate the water effect. Finally, with the aid of scanning electron microscope and failure morphology, the mechanism of water-weakening effect on shale was discussed from microscopic and macroscopic perspectives. The thickness of the double layer increases with the increase of water immersion time. This paper provides a set of useful data for reference in construction in shale strata, and a methodology to evaluate water-weakening effect through laboratory and numerical modelling approaches.http://dx.doi.org/10.1155/2020/5263431 |
| spellingShingle | Zhen Li Shangge Liu Wentao Ren Jinjin Fang Qinghua Zhu Zhilin Dun Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale Advances in Materials Science and Engineering |
| title | Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale |
| title_full | Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale |
| title_fullStr | Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale |
| title_full_unstemmed | Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale |
| title_short | Multiscale Laboratory Study and Numerical Analysis of Water-Weakening Effect on Shale |
| title_sort | multiscale laboratory study and numerical analysis of water weakening effect on shale |
| url | http://dx.doi.org/10.1155/2020/5263431 |
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