The Influence Mechanism of In Situ Stress State on the Stability of Deep-Buried-Curved Tunnel in Qinghai-Tibet Plateau and Its Adjacent Region
In China, rockburst disaster occurs mostly in construction of underground engineering in Qinghai-Tibet Plateau and its adjacent region. Previous research on deep-buried tunnels has indicated that tunnels stability is related to in situ stress state. To quantify these relationships, three-dimensional...
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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/10.1155/2021/9955497 |
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| author | Huiqing Wang Chengxuan Tan Chengjun Feng Peng Zhang Bangshen Qi Zhangliang Tan Jing Meng Weijun Guo |
| author_facet | Huiqing Wang Chengxuan Tan Chengjun Feng Peng Zhang Bangshen Qi Zhangliang Tan Jing Meng Weijun Guo |
| author_sort | Huiqing Wang |
| collection | DOAJ |
| description | In China, rockburst disaster occurs mostly in construction of underground engineering in Qinghai-Tibet Plateau and its adjacent region. Previous research on deep-buried tunnels has indicated that tunnels stability is related to in situ stress state. To quantify these relationships, three-dimensional finite element modeling was done to analyze the influences that the angle φ between the maximum horizontal principal stress orientation and tunnel axis, and the lateral pressure coefficient KH, had on the tangential stress σθ in a deep-buried-curved tunnel. Based on the in situ stress condition in Qinghai-Tibet Plateau and its adjacent region, 50 different simulation conditions were used to analyze the relationship that φ and KH had on σθ for the rock mass surrounding the tunnel. With the simulation data produced, predictive equations were generated for σθ as a function of φ and KH using multivariate regression analysis. These equations help estimate σθ at various key positons along the tunnel boundary at Qinghai-Tibet plateau and its adjacent region. The equations were then proved by a set of typical tunnels to ensure validity. The results concluded that the change in φ has a significant impact on σθ, and thus, the stability of the tunnel, when 30° < φ < 60°, with the most obvious influence being when φ is about 45°. With the equations, the rockburst potential at a certain location within a curved tunnel can be quickly estimated by calculating φ and KH on σθ, without need of geo-stress background knowledge and heavy simulation, allowing for the practical value in engineering at design phase for the projects in Qinghai-Tibet Plateau and its adjacent region. |
| format | Article |
| id | doaj-art-eac192e2673b446c843c756a6d97aa1d |
| institution | OA Journals |
| issn | 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-eac192e2673b446c843c756a6d97aa1d2025-08-20T02:21:39ZengWileyShock and Vibration1875-92032021-01-01202110.1155/2021/9955497The Influence Mechanism of In Situ Stress State on the Stability of Deep-Buried-Curved Tunnel in Qinghai-Tibet Plateau and Its Adjacent RegionHuiqing Wang0Chengxuan Tan1Chengjun Feng2Peng Zhang3Bangshen Qi4Zhangliang Tan5Jing Meng6Weijun Guo7Institute of GeomechanicsInstitute of GeomechanicsInstitute of GeomechanicsInstitute of GeomechanicsInstitute of GeomechanicsUniversity of British ColumbiaInstitute of GeomechanicsBeijing Polytechnic CollegeIn China, rockburst disaster occurs mostly in construction of underground engineering in Qinghai-Tibet Plateau and its adjacent region. Previous research on deep-buried tunnels has indicated that tunnels stability is related to in situ stress state. To quantify these relationships, three-dimensional finite element modeling was done to analyze the influences that the angle φ between the maximum horizontal principal stress orientation and tunnel axis, and the lateral pressure coefficient KH, had on the tangential stress σθ in a deep-buried-curved tunnel. Based on the in situ stress condition in Qinghai-Tibet Plateau and its adjacent region, 50 different simulation conditions were used to analyze the relationship that φ and KH had on σθ for the rock mass surrounding the tunnel. With the simulation data produced, predictive equations were generated for σθ as a function of φ and KH using multivariate regression analysis. These equations help estimate σθ at various key positons along the tunnel boundary at Qinghai-Tibet plateau and its adjacent region. The equations were then proved by a set of typical tunnels to ensure validity. The results concluded that the change in φ has a significant impact on σθ, and thus, the stability of the tunnel, when 30° < φ < 60°, with the most obvious influence being when φ is about 45°. With the equations, the rockburst potential at a certain location within a curved tunnel can be quickly estimated by calculating φ and KH on σθ, without need of geo-stress background knowledge and heavy simulation, allowing for the practical value in engineering at design phase for the projects in Qinghai-Tibet Plateau and its adjacent region.http://dx.doi.org/10.1155/2021/9955497 |
| spellingShingle | Huiqing Wang Chengxuan Tan Chengjun Feng Peng Zhang Bangshen Qi Zhangliang Tan Jing Meng Weijun Guo The Influence Mechanism of In Situ Stress State on the Stability of Deep-Buried-Curved Tunnel in Qinghai-Tibet Plateau and Its Adjacent Region Shock and Vibration |
| title | The Influence Mechanism of In Situ Stress State on the Stability of Deep-Buried-Curved Tunnel in Qinghai-Tibet Plateau and Its Adjacent Region |
| title_full | The Influence Mechanism of In Situ Stress State on the Stability of Deep-Buried-Curved Tunnel in Qinghai-Tibet Plateau and Its Adjacent Region |
| title_fullStr | The Influence Mechanism of In Situ Stress State on the Stability of Deep-Buried-Curved Tunnel in Qinghai-Tibet Plateau and Its Adjacent Region |
| title_full_unstemmed | The Influence Mechanism of In Situ Stress State on the Stability of Deep-Buried-Curved Tunnel in Qinghai-Tibet Plateau and Its Adjacent Region |
| title_short | The Influence Mechanism of In Situ Stress State on the Stability of Deep-Buried-Curved Tunnel in Qinghai-Tibet Plateau and Its Adjacent Region |
| title_sort | influence mechanism of in situ stress state on the stability of deep buried curved tunnel in qinghai tibet plateau and its adjacent region |
| url | http://dx.doi.org/10.1155/2021/9955497 |
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