Overall Instability Failure Mechanism and Monitoring Strategy Research of the Shallow Tunnel under Unsymmetrical Pressure during Operation Period
Aiming at the safety of tunnel operation, based on the investigation and statistical analysis of a large number of operating tunnel diseases, comprehensively considering the interaction between the surrounding rock and the structure, this paper establishes the failure criteria for surrounding rocks...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-01-01
|
| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2022/3105787 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832553626478837760 |
|---|---|
| author | Hongyan Guo Xinrong Liu Ke Li Zuliang Zhong |
| author_facet | Hongyan Guo Xinrong Liu Ke Li Zuliang Zhong |
| author_sort | Hongyan Guo |
| collection | DOAJ |
| description | Aiming at the safety of tunnel operation, based on the investigation and statistical analysis of a large number of operating tunnel diseases, comprehensively considering the interaction between the surrounding rock and the structure, this paper establishes the failure criteria for surrounding rocks and lining materials by using numerical limit analysis and theoretical analysis methods, analyzes the overall stability and instability failure mechanism on the shallow tunnel under unsymmetrical pressure during the operation period by using the strength reduction method in light of the operation safety of the tunnel, proposes the reasonable monitoring strategy, and also constructs monitoring index system. The analysis and research results show that the tunnel structure is affected by bias pressure due to the asymmetry of the terrain. The probability of disease in the bias pressure tunnel under asymmetric terrain conditions is significantly higher than that of the general terrain. The shallow tunnel under unsymmetrical pressure has experienced three development stages from shear failure to overall instability, including rock mass fracture and sliding, structural damage, and overall instability, which can be divided into eight processes. During operation, the key monitoring indicators of surface deformation are the subsidence and deformation of the slope top and the horizontal displacement of the slope itself, followed by the monitoring of the uplift and deformation at the bottom of the slope. Meanwhile, close attention should be paid to the structural stress states in the sliding direction and perpendicular to the sliding direction of the lining structure, which demonstrates that the principal compressive stress in the sliding direction is more sensitive than the principal tensile stress in perpendicular to the sliding direction and should be listed as the key monitoring and early warning indicators of the structural stress. |
| format | Article |
| id | doaj-art-ab9d29648f50457a83f56f0ad0b1194b |
| institution | Kabale University |
| issn | 1687-8442 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-ab9d29648f50457a83f56f0ad0b1194b2025-02-03T05:53:34ZengWileyAdvances in Materials Science and Engineering1687-84422022-01-01202210.1155/2022/3105787Overall Instability Failure Mechanism and Monitoring Strategy Research of the Shallow Tunnel under Unsymmetrical Pressure during Operation PeriodHongyan Guo0Xinrong Liu1Ke Li2Zuliang Zhong3Chongqing UniversityChongqing UniversityChina Merchants Chongqing Communications Technology Research and Design Institute Co.,Ltd.Chongqing UniversityAiming at the safety of tunnel operation, based on the investigation and statistical analysis of a large number of operating tunnel diseases, comprehensively considering the interaction between the surrounding rock and the structure, this paper establishes the failure criteria for surrounding rocks and lining materials by using numerical limit analysis and theoretical analysis methods, analyzes the overall stability and instability failure mechanism on the shallow tunnel under unsymmetrical pressure during the operation period by using the strength reduction method in light of the operation safety of the tunnel, proposes the reasonable monitoring strategy, and also constructs monitoring index system. The analysis and research results show that the tunnel structure is affected by bias pressure due to the asymmetry of the terrain. The probability of disease in the bias pressure tunnel under asymmetric terrain conditions is significantly higher than that of the general terrain. The shallow tunnel under unsymmetrical pressure has experienced three development stages from shear failure to overall instability, including rock mass fracture and sliding, structural damage, and overall instability, which can be divided into eight processes. During operation, the key monitoring indicators of surface deformation are the subsidence and deformation of the slope top and the horizontal displacement of the slope itself, followed by the monitoring of the uplift and deformation at the bottom of the slope. Meanwhile, close attention should be paid to the structural stress states in the sliding direction and perpendicular to the sliding direction of the lining structure, which demonstrates that the principal compressive stress in the sliding direction is more sensitive than the principal tensile stress in perpendicular to the sliding direction and should be listed as the key monitoring and early warning indicators of the structural stress.http://dx.doi.org/10.1155/2022/3105787 |
| spellingShingle | Hongyan Guo Xinrong Liu Ke Li Zuliang Zhong Overall Instability Failure Mechanism and Monitoring Strategy Research of the Shallow Tunnel under Unsymmetrical Pressure during Operation Period Advances in Materials Science and Engineering |
| title | Overall Instability Failure Mechanism and Monitoring Strategy Research of the Shallow Tunnel under Unsymmetrical Pressure during Operation Period |
| title_full | Overall Instability Failure Mechanism and Monitoring Strategy Research of the Shallow Tunnel under Unsymmetrical Pressure during Operation Period |
| title_fullStr | Overall Instability Failure Mechanism and Monitoring Strategy Research of the Shallow Tunnel under Unsymmetrical Pressure during Operation Period |
| title_full_unstemmed | Overall Instability Failure Mechanism and Monitoring Strategy Research of the Shallow Tunnel under Unsymmetrical Pressure during Operation Period |
| title_short | Overall Instability Failure Mechanism and Monitoring Strategy Research of the Shallow Tunnel under Unsymmetrical Pressure during Operation Period |
| title_sort | overall instability failure mechanism and monitoring strategy research of the shallow tunnel under unsymmetrical pressure during operation period |
| url | http://dx.doi.org/10.1155/2022/3105787 |
| work_keys_str_mv | AT hongyanguo overallinstabilityfailuremechanismandmonitoringstrategyresearchoftheshallowtunnelunderunsymmetricalpressureduringoperationperiod AT xinrongliu overallinstabilityfailuremechanismandmonitoringstrategyresearchoftheshallowtunnelunderunsymmetricalpressureduringoperationperiod AT keli overallinstabilityfailuremechanismandmonitoringstrategyresearchoftheshallowtunnelunderunsymmetricalpressureduringoperationperiod AT zuliangzhong overallinstabilityfailuremechanismandmonitoringstrategyresearchoftheshallowtunnelunderunsymmetricalpressureduringoperationperiod |