Prediction of water inflow and analysis of surrounding rock stability in unfavorable geological mountain tunnel
During the construction of a mountain tunnel, water inflow and rock instability are common occurrences due to unfavorable geological conditions, posing serious threats to construction safety. This study focuses on a proposed mountain tunnel and employs multiple formulas to predict potential water in...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2024-02-01
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| Series: | Frontiers in Earth Science |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2024.1373627/full |
| _version_ | 1827339783796424704 |
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| author | Yunjuan Chen Yunjuan Chen Mengyue Liu Mengzhen Su Mingxu Ding Haolin Li Yi Jing |
| author_facet | Yunjuan Chen Yunjuan Chen Mengyue Liu Mengzhen Su Mingxu Ding Haolin Li Yi Jing |
| author_sort | Yunjuan Chen |
| collection | DOAJ |
| description | During the construction of a mountain tunnel, water inflow and rock instability are common occurrences due to unfavorable geological conditions, posing serious threats to construction safety. This study focuses on a proposed mountain tunnel and employs multiple formulas to predict potential water inflow during excavation. Based on the amount of water inflow and deformation of surrounding rocks, comprehensive determinations are made for the thickness of grouting rings and permeability coefficients. The results demonstrate that: 1) Different formulas yield slightly varied outcomes but overall trends remain consistent; considering various calculations, the normal water inflow for this tunnel is approximately 115.5908×103 m3/d with a maximum at 210.9100×103 m3/d 2) Increasing grouting ring thickness or decreasing permeability coefficient can effectively reduce water inflow, but the reduction range is gradually narrowed. 3) Pre-grouting curtains have an evident effect in enhancing stability; however, their effectiveness decreases with increased thickness. 4) Taking into account both safety and economic factors, it is recommended that the grouting ring thickness be set at 8 m with a permeability coefficient equaling one 100th that of surrounding rocks for this tunnel project. |
| first_indexed | 2024-03-07T20:07:40Z |
| format | Article |
| id | doaj.art-1b042073e9814f2db5119b887073c316 |
| institution | Directory Open Access Journal |
| issn | 2296-6463 |
| language | English |
| last_indexed | 2024-03-07T20:07:40Z |
| publishDate | 2024-02-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj.art-1b042073e9814f2db5119b887073c3162024-02-28T04:43:55ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632024-02-011210.3389/feart.2024.13736271373627Prediction of water inflow and analysis of surrounding rock stability in unfavorable geological mountain tunnelYunjuan Chen0Yunjuan Chen1Mengyue Liu2Mengzhen Su3Mingxu Ding4Haolin Li5Yi Jing6School of Civil Engineering, Shandong Jianzhu University, Jinan, Shandong, ChinaKey Laboratory of Building Structural Retrofitting and Underground Space Engineering, Ministry of Education, Shandong Jianzhu University, Jinan, Shandong, ChinaSchool of Civil Engineering, Shandong Jianzhu University, Jinan, Shandong, ChinaSchool of Civil Engineering, Shandong Jianzhu University, Jinan, Shandong, ChinaSchool of Civil Engineering, Shandong Jianzhu University, Jinan, Shandong, ChinaSchool of Civil Engineering, Shandong Jianzhu University, Jinan, Shandong, ChinaSchool of Qilu Transportation, Shandong University, Jinan, Shandong, ChinaDuring the construction of a mountain tunnel, water inflow and rock instability are common occurrences due to unfavorable geological conditions, posing serious threats to construction safety. This study focuses on a proposed mountain tunnel and employs multiple formulas to predict potential water inflow during excavation. Based on the amount of water inflow and deformation of surrounding rocks, comprehensive determinations are made for the thickness of grouting rings and permeability coefficients. The results demonstrate that: 1) Different formulas yield slightly varied outcomes but overall trends remain consistent; considering various calculations, the normal water inflow for this tunnel is approximately 115.5908×103 m3/d with a maximum at 210.9100×103 m3/d 2) Increasing grouting ring thickness or decreasing permeability coefficient can effectively reduce water inflow, but the reduction range is gradually narrowed. 3) Pre-grouting curtains have an evident effect in enhancing stability; however, their effectiveness decreases with increased thickness. 4) Taking into account both safety and economic factors, it is recommended that the grouting ring thickness be set at 8 m with a permeability coefficient equaling one 100th that of surrounding rocks for this tunnel project.https://www.frontiersin.org/articles/10.3389/feart.2024.1373627/fullmountain tunneladverse geologywater inflowrock stabilitygrouting ringnumerical simulation |
| spellingShingle | Yunjuan Chen Yunjuan Chen Mengyue Liu Mengzhen Su Mingxu Ding Haolin Li Yi Jing Prediction of water inflow and analysis of surrounding rock stability in unfavorable geological mountain tunnel Frontiers in Earth Science mountain tunnel adverse geology water inflow rock stability grouting ring numerical simulation |
| title | Prediction of water inflow and analysis of surrounding rock stability in unfavorable geological mountain tunnel |
| title_full | Prediction of water inflow and analysis of surrounding rock stability in unfavorable geological mountain tunnel |
| title_fullStr | Prediction of water inflow and analysis of surrounding rock stability in unfavorable geological mountain tunnel |
| title_full_unstemmed | Prediction of water inflow and analysis of surrounding rock stability in unfavorable geological mountain tunnel |
| title_short | Prediction of water inflow and analysis of surrounding rock stability in unfavorable geological mountain tunnel |
| title_sort | prediction of water inflow and analysis of surrounding rock stability in unfavorable geological mountain tunnel |
| topic | mountain tunnel adverse geology water inflow rock stability grouting ring numerical simulation |
| url | https://www.frontiersin.org/articles/10.3389/feart.2024.1373627/full |
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