An extended discontinuous deformation analysis for simulation of grouting reinforcement in a water-rich fractured rock tunnel
Grouting has been the most effective approach to mitigate water inrush disasters in underground engineering due to its ability to plug groundwater and enhance rock strength. Nevertheless, there is a lack of potent numerical tools for assessing the grouting effectiveness in water-rich fractured strat...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S167477552400146X |
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| author | Jingyao Gao Siyu Peng Guangqi Chen Hongyun Fan |
| author_facet | Jingyao Gao Siyu Peng Guangqi Chen Hongyun Fan |
| author_sort | Jingyao Gao |
| collection | DOAJ |
| description | Grouting has been the most effective approach to mitigate water inrush disasters in underground engineering due to its ability to plug groundwater and enhance rock strength. Nevertheless, there is a lack of potent numerical tools for assessing the grouting effectiveness in water-rich fractured strata. In this study, the hydro-mechanical coupled discontinuous deformation analysis (HM-DDA) is inaugurally extended to simulate the grouting process in a water-rich discrete fracture network (DFN), including the slurry migration, fracture dilation, water plugging in a seepage field, and joint reinforcement after coagulation. To validate the capabilities of the developed method, several numerical examples are conducted incorporating the Newtonian fluid and Bingham slurry. The simulation results closely align with the analytical solutions. Additionally, a set of compression tests is conducted on the fresh and grouted rock specimens to verify the reinforcement method and calibrate the rational properties of reinforced joints. An engineering-scale model based on a real water inrush case of the Yonglian tunnel in a water-rich fractured zone has been established. The model demonstrates the effectiveness of grouting reinforcement in mitigating water inrush disaster. The results indicate that increased grouting pressure greatly affects the regulation of water outflow from the tunnel face and the prevention of rock detachment face after excavation. |
| format | Article |
| id | doaj-art-9f780b617b1d428896c66497808ebd43 |
| institution | Kabale University |
| issn | 1674-7755 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj-art-9f780b617b1d428896c66497808ebd432025-01-17T04:49:07ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552025-01-01171168186An extended discontinuous deformation analysis for simulation of grouting reinforcement in a water-rich fractured rock tunnelJingyao Gao0Siyu Peng1Guangqi Chen2Hongyun Fan3Department of Civil and Structural Engineering, Kyushu University, Fukuoka, 819-0395, JapanDepartment of Civil and Structural Engineering, Kyushu University, Fukuoka, 819-0395, Japan; School of Resources and Safety Engineering, Central South University, Changsha, Hunan, 410083, China; Corresponding author. Department of Civil and Structural Engineering, Kyushu University, Fukuoka, 819-0395, Japan.Department of Civil and Structural Engineering, Kyushu University, Fukuoka, 819-0395, Japan; School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, 300401, China; Corresponding author. Department of Civil and Structural Engineering, Kyushu University, Fukuoka, 819-0395, Japan.Department of Civil and Structural Engineering, Kyushu University, Fukuoka, 819-0395, Japan; School of Qilu Transportation, Shandong University, Jinan, Shandong, 250000, ChinaGrouting has been the most effective approach to mitigate water inrush disasters in underground engineering due to its ability to plug groundwater and enhance rock strength. Nevertheless, there is a lack of potent numerical tools for assessing the grouting effectiveness in water-rich fractured strata. In this study, the hydro-mechanical coupled discontinuous deformation analysis (HM-DDA) is inaugurally extended to simulate the grouting process in a water-rich discrete fracture network (DFN), including the slurry migration, fracture dilation, water plugging in a seepage field, and joint reinforcement after coagulation. To validate the capabilities of the developed method, several numerical examples are conducted incorporating the Newtonian fluid and Bingham slurry. The simulation results closely align with the analytical solutions. Additionally, a set of compression tests is conducted on the fresh and grouted rock specimens to verify the reinforcement method and calibrate the rational properties of reinforced joints. An engineering-scale model based on a real water inrush case of the Yonglian tunnel in a water-rich fractured zone has been established. The model demonstrates the effectiveness of grouting reinforcement in mitigating water inrush disaster. The results indicate that increased grouting pressure greatly affects the regulation of water outflow from the tunnel face and the prevention of rock detachment face after excavation.http://www.sciencedirect.com/science/article/pii/S167477552400146XDiscontinuous deformation analysis (DDA)Water-rich fractured rock tunnelGrouting reinforcementWater inrush disaster |
| spellingShingle | Jingyao Gao Siyu Peng Guangqi Chen Hongyun Fan An extended discontinuous deformation analysis for simulation of grouting reinforcement in a water-rich fractured rock tunnel Journal of Rock Mechanics and Geotechnical Engineering Discontinuous deformation analysis (DDA) Water-rich fractured rock tunnel Grouting reinforcement Water inrush disaster |
| title | An extended discontinuous deformation analysis for simulation of grouting reinforcement in a water-rich fractured rock tunnel |
| title_full | An extended discontinuous deformation analysis for simulation of grouting reinforcement in a water-rich fractured rock tunnel |
| title_fullStr | An extended discontinuous deformation analysis for simulation of grouting reinforcement in a water-rich fractured rock tunnel |
| title_full_unstemmed | An extended discontinuous deformation analysis for simulation of grouting reinforcement in a water-rich fractured rock tunnel |
| title_short | An extended discontinuous deformation analysis for simulation of grouting reinforcement in a water-rich fractured rock tunnel |
| title_sort | extended discontinuous deformation analysis for simulation of grouting reinforcement in a water rich fractured rock tunnel |
| topic | Discontinuous deformation analysis (DDA) Water-rich fractured rock tunnel Grouting reinforcement Water inrush disaster |
| url | http://www.sciencedirect.com/science/article/pii/S167477552400146X |
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