The Inversion Method Applied to the Stress Field around a Deeply Buried Tunnel Based on Surface Strain
To identify the magnitude and direction of in situ stress in deeply buried tunnels, an inversion method for the stress field was proposed based on a finite number of measurement points of surface strain. Firstly, elastic strain data of finite points on the surface of tunnel surrounding rock were acq...
| Main Authors: | , , , , , |
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| Format: | Article |
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MDPI AG
2023-11-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/13/22/12507 |
| _version_ | 1797460248520294400 |
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| author | Xiaobing Yan Qiqi Hao Rui Yang Jianyu Peng Fengpeng Zhang Sanyuan Tan |
| author_facet | Xiaobing Yan Qiqi Hao Rui Yang Jianyu Peng Fengpeng Zhang Sanyuan Tan |
| author_sort | Xiaobing Yan |
| collection | DOAJ |
| description | To identify the magnitude and direction of in situ stress in deeply buried tunnels, an inversion method for the stress field was proposed based on a finite number of measurement points of surface strain. Firstly, elastic strain data of finite points on the surface of tunnel surrounding rock were acquired using the borehole stress relief method at the engineering site. Secondly, a finite element model of the tunnel surrounding rock with plastic damage was established, and the parameters of the finite element model were substituted using the SIGINI subroutine. Then, an improved Surrogate Model Accelerated Random Search (SMARS) was developed using genetic algorithm programming on the MATLAB™ platform to invert and attain the globally optimal boundary conditions. Finally, the obtained optimal boundary conditions were applied to the numerical model to calculate the stress distribution in the engineering site. The reliability of this method was validated through a three-dimensional example. The method has been successfully applied to the stress-field analysis of deep tunnels in Macheng Iron Mine, Hebei Province, China. The research results show that this method is a low-cost, reliable approach for stress-field inversion in the rock around a tunnel. |
| first_indexed | 2024-03-09T17:02:26Z |
| format | Article |
| id | doaj.art-4ece3f24b8824ab99eabafc5800f4938 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T17:02:26Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-4ece3f24b8824ab99eabafc5800f49382023-11-24T14:28:13ZengMDPI AGApplied Sciences2076-34172023-11-0113221250710.3390/app132212507The Inversion Method Applied to the Stress Field around a Deeply Buried Tunnel Based on Surface StrainXiaobing Yan0Qiqi Hao1Rui Yang2Jianyu Peng3Fengpeng Zhang4Sanyuan Tan5Hunan Lianshao Construction Engineering (Group) Co., Ltd., Changsha 410012, ChinaKey Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, ChinaHunan Lianshao Construction Engineering (Group) Co., Ltd., Changsha 410012, ChinaKey Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, ChinaKey Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines, Northeastern University, Shenyang 110819, ChinaHunan Lianshao Construction Engineering (Group) Co., Ltd., Changsha 410012, ChinaTo identify the magnitude and direction of in situ stress in deeply buried tunnels, an inversion method for the stress field was proposed based on a finite number of measurement points of surface strain. Firstly, elastic strain data of finite points on the surface of tunnel surrounding rock were acquired using the borehole stress relief method at the engineering site. Secondly, a finite element model of the tunnel surrounding rock with plastic damage was established, and the parameters of the finite element model were substituted using the SIGINI subroutine. Then, an improved Surrogate Model Accelerated Random Search (SMARS) was developed using genetic algorithm programming on the MATLAB™ platform to invert and attain the globally optimal boundary conditions. Finally, the obtained optimal boundary conditions were applied to the numerical model to calculate the stress distribution in the engineering site. The reliability of this method was validated through a three-dimensional example. The method has been successfully applied to the stress-field analysis of deep tunnels in Macheng Iron Mine, Hebei Province, China. The research results show that this method is a low-cost, reliable approach for stress-field inversion in the rock around a tunnel.https://www.mdpi.com/2076-3417/13/22/12507borehole stress relief methodgenetic algorithmSMARSsurface strainsurrounding rock stress field |
| spellingShingle | Xiaobing Yan Qiqi Hao Rui Yang Jianyu Peng Fengpeng Zhang Sanyuan Tan The Inversion Method Applied to the Stress Field around a Deeply Buried Tunnel Based on Surface Strain Applied Sciences borehole stress relief method genetic algorithm SMARS surface strain surrounding rock stress field |
| title | The Inversion Method Applied to the Stress Field around a Deeply Buried Tunnel Based on Surface Strain |
| title_full | The Inversion Method Applied to the Stress Field around a Deeply Buried Tunnel Based on Surface Strain |
| title_fullStr | The Inversion Method Applied to the Stress Field around a Deeply Buried Tunnel Based on Surface Strain |
| title_full_unstemmed | The Inversion Method Applied to the Stress Field around a Deeply Buried Tunnel Based on Surface Strain |
| title_short | The Inversion Method Applied to the Stress Field around a Deeply Buried Tunnel Based on Surface Strain |
| title_sort | inversion method applied to the stress field around a deeply buried tunnel based on surface strain |
| topic | borehole stress relief method genetic algorithm SMARS surface strain surrounding rock stress field |
| url | https://www.mdpi.com/2076-3417/13/22/12507 |
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