Journal
STRUCTURAL ENGINEERING AND MECHANICS
Volume 45, Issue 3, Pages 337-354Publisher
TECHNO-PRESS
DOI: 10.12989/sem.2013.45.3.337
Keywords
shield TBM tunnel; segment joint; full-scale; mechanical model; joint test
Categories
Funding
- National Natural Science Foundation of China [50878149]
- National Basic Research Program of China (973 Program) [2011CB013800]
- Kwang-Hua Fund for the College of Civil Engineering of Tongji University
- Fundamental Research Funds for the Central Universities
- Program for Changjiang Scholars and Innovative Research Team in University ( [PCSIRT,IRT1029]
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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.
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