Investigation on the AE characteristics and progressive failure behaviors of tunnels by strength reduction method
The fracture features and failure mechanisms of tunnels excavated in shallow and deep rock masses are investigated using a series of three-dimensional heterogeneous models that incorporate cross section, tunnel alignment, faults and tunnel support system. The strength reduction method is embedded in...
Saved in:
| Main Authors: | , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2025-05-01
|
| Series: | Frontiers in Earth Science |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/articles/10.3389/feart.2025.1426226/full |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849727933687529472 |
|---|---|
| author | Xianhui Feng Yadav Kedar Prasad Bin Gong Xiaofeng Cheng Wenshuo Duan Huilin Liu Fenhua Ren |
| author_facet | Xianhui Feng Yadav Kedar Prasad Bin Gong Xiaofeng Cheng Wenshuo Duan Huilin Liu Fenhua Ren |
| author_sort | Xianhui Feng |
| collection | DOAJ |
| description | The fracture features and failure mechanisms of tunnels excavated in shallow and deep rock masses are investigated using a series of three-dimensional heterogeneous models that incorporate cross section, tunnel alignment, faults and tunnel support system. The strength reduction method is embedded in the rock failure process analysis method to achieve the gradual fracture process, macro failure mode and safety factor, and to reproduce the characteristic fracture phenomenon of surrounding rock masses. The mechanical mechanisms and acoustic emission energy of deep rocks at the different stages of the whole formation process of zonal disintegration are further discussed. The results indicate that the zonal disintegration process is triggered by the stress redistribution; cross section influences the stress buildup, stress shadow and stress transfer as well as the failure mode of surrounding rock mass; the dip of faults and tunnel support system can affect zonal disintegration pattern near the tunnel surface along their strikes; the twin-tunnel layout makes zonal disintegration pattern more intricate. These insights advance our understanding of the zonal disintegration in deep engineering. |
| format | Article |
| id | doaj-art-8313f8bb656c4a43b5af7b330c064cc9 |
| institution | DOAJ |
| issn | 2296-6463 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Earth Science |
| spelling | doaj-art-8313f8bb656c4a43b5af7b330c064cc92025-08-20T03:09:44ZengFrontiers Media S.A.Frontiers in Earth Science2296-64632025-05-011310.3389/feart.2025.14262261426226Investigation on the AE characteristics and progressive failure behaviors of tunnels by strength reduction methodXianhui Feng0Yadav Kedar Prasad1Bin Gong2Xiaofeng Cheng3Wenshuo Duan4Huilin Liu5Fenhua Ren6School of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing, ChinaChina Communication Construction 4th Harbour Engineering Co. Ltd, Fuzhou, ChinaDepartment of Civil and Environmental Engineering, Brunel University of London, London, United KingdomCollege of Water Resources and Architectural Engineering, Northwest A&F University, Yangling, ChinaState Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian, ChinaSchool of Resources and Safety Engineering, Central South University, Changsha, Hunan, ChinaSchool of Civil and Resources Engineering, University of Science and Technology Beijing, Beijing, ChinaThe fracture features and failure mechanisms of tunnels excavated in shallow and deep rock masses are investigated using a series of three-dimensional heterogeneous models that incorporate cross section, tunnel alignment, faults and tunnel support system. The strength reduction method is embedded in the rock failure process analysis method to achieve the gradual fracture process, macro failure mode and safety factor, and to reproduce the characteristic fracture phenomenon of surrounding rock masses. The mechanical mechanisms and acoustic emission energy of deep rocks at the different stages of the whole formation process of zonal disintegration are further discussed. The results indicate that the zonal disintegration process is triggered by the stress redistribution; cross section influences the stress buildup, stress shadow and stress transfer as well as the failure mode of surrounding rock mass; the dip of faults and tunnel support system can affect zonal disintegration pattern near the tunnel surface along their strikes; the twin-tunnel layout makes zonal disintegration pattern more intricate. These insights advance our understanding of the zonal disintegration in deep engineering.https://www.frontiersin.org/articles/10.3389/feart.2025.1426226/fulltunnel failurestrength reductioncross sectionfaultssupport systemtunnel layout |
| spellingShingle | Xianhui Feng Yadav Kedar Prasad Bin Gong Xiaofeng Cheng Wenshuo Duan Huilin Liu Fenhua Ren Investigation on the AE characteristics and progressive failure behaviors of tunnels by strength reduction method Frontiers in Earth Science tunnel failure strength reduction cross section faults support system tunnel layout |
| title | Investigation on the AE characteristics and progressive failure behaviors of tunnels by strength reduction method |
| title_full | Investigation on the AE characteristics and progressive failure behaviors of tunnels by strength reduction method |
| title_fullStr | Investigation on the AE characteristics and progressive failure behaviors of tunnels by strength reduction method |
| title_full_unstemmed | Investigation on the AE characteristics and progressive failure behaviors of tunnels by strength reduction method |
| title_short | Investigation on the AE characteristics and progressive failure behaviors of tunnels by strength reduction method |
| title_sort | investigation on the ae characteristics and progressive failure behaviors of tunnels by strength reduction method |
| topic | tunnel failure strength reduction cross section faults support system tunnel layout |
| url | https://www.frontiersin.org/articles/10.3389/feart.2025.1426226/full |
| work_keys_str_mv | AT xianhuifeng investigationontheaecharacteristicsandprogressivefailurebehaviorsoftunnelsbystrengthreductionmethod AT yadavkedarprasad investigationontheaecharacteristicsandprogressivefailurebehaviorsoftunnelsbystrengthreductionmethod AT bingong investigationontheaecharacteristicsandprogressivefailurebehaviorsoftunnelsbystrengthreductionmethod AT xiaofengcheng investigationontheaecharacteristicsandprogressivefailurebehaviorsoftunnelsbystrengthreductionmethod AT wenshuoduan investigationontheaecharacteristicsandprogressivefailurebehaviorsoftunnelsbystrengthreductionmethod AT huilinliu investigationontheaecharacteristicsandprogressivefailurebehaviorsoftunnelsbystrengthreductionmethod AT fenhuaren investigationontheaecharacteristicsandprogressivefailurebehaviorsoftunnelsbystrengthreductionmethod |