Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures
The transverse effective rigidity ratio is a key parameter when the uniform rigidity ring model is adopted to design or numerically analyse segmental lining structures commonly used on a shield-driven tunnel. Traditionally, the transverse effective rigidity ratio η is treated as a constant, which ca...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8836505 |
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| author | Yong-feng Tang Han-cheng Chen Zhen-wei Ye Ting-jin Liu Yu-bing Yang |
| author_facet | Yong-feng Tang Han-cheng Chen Zhen-wei Ye Ting-jin Liu Yu-bing Yang |
| author_sort | Yong-feng Tang |
| collection | DOAJ |
| description | The transverse effective rigidity ratio is a key parameter when the uniform rigidity ring model is adopted to design or numerically analyse segmental lining structures commonly used on a shield-driven tunnel. Traditionally, the transverse effective rigidity ratio η is treated as a constant, which can be evaluated through theoretical analysis and model tests. In this study, scale models were designed and tested to investigate the variation of the transverse effective rigidity ratio in the segmental linings’ flattening deformation process. The test results suggested that in the elastic stage, the transverse effective rigidity ratio fluctuated between 0.667 and 0.734 for the stagger-jointed rings and fluctuated between 0.503 and 0.642 for the straight-jointed rings. When segmental linings were squashed and started to crack at the circumferential joints, the transverse effective rigidity ratio decreases sharply. Then, a regression equation was obtained to fit the variation trend of η with the increase of horizontal convergence to the outer-diameter ratio (ΔD/Dout). Finally, in a case study, the regression equation was adapted to determine the value of η of an operated shield tunnel which was once surcharged accidentally and deformed severely so as to numerically predict the prospective deformation induced by the upcoming adjacent excavation. Numerical results indicated that as the value of η decreases, the horizontal convergences of shield tunnel induced by adjacent excavation increase significantly and even more than doubled in the case study. Comparatively, through taking account of the operating tunnels’ exiting transverse deformation, the predicted deformation tends to be unfavourable. |
| format | Article |
| id | doaj-art-dedaa26781ea484499cedc3ef327dded |
| institution | OA Journals |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-dedaa26781ea484499cedc3ef327dded2025-08-20T02:21:20ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88365058836505Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining StructuresYong-feng Tang0Han-cheng Chen1Zhen-wei Ye2Ting-jin Liu3Yu-bing Yang4School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, ChinaSchool of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510640, Guangdong, ChinaSouth China Institute of Geotechnical Engineering, South China University of Technology, Guangzhou 510640, Guangdong, ChinaCollege of Water Conservancy and Civil Engineering, South China Agricultural University, Guangzhou 510642, Guangdong, ChinaThe transverse effective rigidity ratio is a key parameter when the uniform rigidity ring model is adopted to design or numerically analyse segmental lining structures commonly used on a shield-driven tunnel. Traditionally, the transverse effective rigidity ratio η is treated as a constant, which can be evaluated through theoretical analysis and model tests. In this study, scale models were designed and tested to investigate the variation of the transverse effective rigidity ratio in the segmental linings’ flattening deformation process. The test results suggested that in the elastic stage, the transverse effective rigidity ratio fluctuated between 0.667 and 0.734 for the stagger-jointed rings and fluctuated between 0.503 and 0.642 for the straight-jointed rings. When segmental linings were squashed and started to crack at the circumferential joints, the transverse effective rigidity ratio decreases sharply. Then, a regression equation was obtained to fit the variation trend of η with the increase of horizontal convergence to the outer-diameter ratio (ΔD/Dout). Finally, in a case study, the regression equation was adapted to determine the value of η of an operated shield tunnel which was once surcharged accidentally and deformed severely so as to numerically predict the prospective deformation induced by the upcoming adjacent excavation. Numerical results indicated that as the value of η decreases, the horizontal convergences of shield tunnel induced by adjacent excavation increase significantly and even more than doubled in the case study. Comparatively, through taking account of the operating tunnels’ exiting transverse deformation, the predicted deformation tends to be unfavourable.http://dx.doi.org/10.1155/2020/8836505 |
| spellingShingle | Yong-feng Tang Han-cheng Chen Zhen-wei Ye Ting-jin Liu Yu-bing Yang Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures Advances in Civil Engineering |
| title | Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures |
| title_full | Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures |
| title_fullStr | Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures |
| title_full_unstemmed | Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures |
| title_short | Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures |
| title_sort | experimental study on the transverse effective bending rigidity of segmental lining structures |
| url | http://dx.doi.org/10.1155/2020/8836505 |
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