Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo-Stress
The tunnel face collapses easily during tunnel construction in weak surrounding rock under high geo-stress. Identifying the instability mechanism of the face and proposing targeted control measures are of great importance to prevent the collapse of the face. Using the setting of the carbonaceous phy...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/3870227 |
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| author | Song Pu Tao Yu Laibin Ye Hang Liao Yong Fang Zhigang Yao Jun Wang |
| author_facet | Song Pu Tao Yu Laibin Ye Hang Liao Yong Fang Zhigang Yao Jun Wang |
| author_sort | Song Pu |
| collection | DOAJ |
| description | The tunnel face collapses easily during tunnel construction in weak surrounding rock under high geo-stress. Identifying the instability mechanism of the face and proposing targeted control measures are of great importance to prevent the collapse of the face. Using the setting of the carbonaceous phyllite stratum of the Baima tunnel, a FLAC3D-PFC3D coupled model is used to analyze the influential factors on the stability of the face and optimize the original support scheme. The results show that the instability of the face is rooted in the collapse of the rock above the face, and the bench method with short cycle footage is more conducive to the stability of the face. Compared with single support mode of advanced small pipes, the combined support scheme of long bolts and small pipes can better control the displacement of the surrounding rock and prevent the collapse of the tunnel face. The numerical simulation and field surrounding rock monitoring results verify the rationality of the excavation method, the cycle footage, and the support system. This finding will be of great significance to guide design and construction in weak surrounding rock. |
| format | Article |
| id | doaj-art-4f64f8a898734ae19f73c8e02f4dad49 |
| institution | OA Journals |
| issn | 1687-8094 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-4f64f8a898734ae19f73c8e02f4dad492025-08-20T02:05:36ZengWileyAdvances in Civil Engineering1687-80942022-01-01202210.1155/2022/3870227Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo-StressSong Pu0Tao Yu1Laibin Ye2Hang Liao3Yong Fang4Zhigang Yao5Jun Wang6Southwest Jiaotong UniversitySouthwest Jiaotong UniversitySouthwest Jiaotong UniversitySouthwest Jiaotong UniversitySouthwest Jiaotong UniversitySouthwest Jiaotong UniversitySichuan Highway Planning, Survey, Design and Research Institute LtdThe tunnel face collapses easily during tunnel construction in weak surrounding rock under high geo-stress. Identifying the instability mechanism of the face and proposing targeted control measures are of great importance to prevent the collapse of the face. Using the setting of the carbonaceous phyllite stratum of the Baima tunnel, a FLAC3D-PFC3D coupled model is used to analyze the influential factors on the stability of the face and optimize the original support scheme. The results show that the instability of the face is rooted in the collapse of the rock above the face, and the bench method with short cycle footage is more conducive to the stability of the face. Compared with single support mode of advanced small pipes, the combined support scheme of long bolts and small pipes can better control the displacement of the surrounding rock and prevent the collapse of the tunnel face. The numerical simulation and field surrounding rock monitoring results verify the rationality of the excavation method, the cycle footage, and the support system. This finding will be of great significance to guide design and construction in weak surrounding rock.http://dx.doi.org/10.1155/2022/3870227 |
| spellingShingle | Song Pu Tao Yu Laibin Ye Hang Liao Yong Fang Zhigang Yao Jun Wang Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo-Stress Advances in Civil Engineering |
| title | Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo-Stress |
| title_full | Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo-Stress |
| title_fullStr | Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo-Stress |
| title_full_unstemmed | Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo-Stress |
| title_short | Study on Instability Mechanism and Support Scheme of the Tunnel Face in Carbonaceous Phyllite Stratum under High Geo-Stress |
| title_sort | study on instability mechanism and support scheme of the tunnel face in carbonaceous phyllite stratum under high geo stress |
| url | http://dx.doi.org/10.1155/2022/3870227 |
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