Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures
Joint Authors
Liu, Ting-jin
Yang, Yubing
Tang, Yong-feng
Chen, Han-cheng
Ye, Zhen-wei
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-20, 20 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-12-10
Country of Publication
Egypt
No. of Pages
20
Main Subjects
Abstract EN
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.
American Psychological Association (APA)
Tang, Yong-feng& Chen, Han-cheng& Ye, Zhen-wei& Liu, Ting-jin& Yang, Yubing. 2020. Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-20.
https://search.emarefa.net/detail/BIM-1123595
Modern Language Association (MLA)
Tang, Yong-feng…[et al.]. Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures. Advances in Civil Engineering No. 2020 (2020), pp.1-20.
https://search.emarefa.net/detail/BIM-1123595
American Medical Association (AMA)
Tang, Yong-feng& Chen, Han-cheng& Ye, Zhen-wei& Liu, Ting-jin& Yang, Yubing. Experimental Study on the Transverse Effective Bending Rigidity of Segmental Lining Structures. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-20.
https://search.emarefa.net/detail/BIM-1123595
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1123595