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Structural Engineering and Mechanics Volume 45, Number 3, February10 2013 , pages 337-354 DOI: https://doi.org/10.12989/sem.2013.45.3.337 |
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Full-scale testing and modeling of the mechanical behavior of shield TBM tunnel joints |
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Wen-qi Ding, Yi-cheng Peng, Zhi-guo Yan, Bi-wei Shen, He-hua Zhu and Xin-xin Wei
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| Abstract | ||
| For shield TBM (Tunnel Boring Machine) tunnel lining, the segment joint is the most critical component for determining the mechanical response of the complete lining ring. To investigate the mechanical behavior of the segment joint in a water conveyance tunnel, which is different from the vehicle tunnel because of the external loads and the high internal water pressure during the tunnel\'s service life, full-scale joint tests were conducted. The main advantage of the joint tests over previous ones was the definiteness of the loads applied to the joints using a unique testing facility and the acquisition of the mechanical behavior of actual joints. Furthermore, based on the test results and the theoretical analysis, a mechanical model of segment joints has been proposed, which consists of all important influencing factors, including the elastic-plastic behavior of concrete, the pre-tightening force of the bolts and the deformations of all joint components, i.e., concrete blocks, bolts and cast iron panels. Finally, the proposed mechanical model of segment joints has been verified by the aforementioned full-scale joint tests. | ||
| Key Words | ||
| shield TBM tunnel; segment joint; full-scale; mechanical model; joint test | ||
| Address | ||
| Wen-qi Ding, Yi-cheng Peng, Zhi-guo Yan, Bi-wei Shen, He-hua Zhu and Xin-xin Wei: Department of Geotechnical Engineering, Tongji University, Shanghai, China; Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, China | ||