Abstract
Water leakage through segmental joints often occurs for shield tunnels built under groundwater. Chloride ions in groundwater can cause the corrosion of steel bolts in segmental joints, reducing the rigidity of the tunnel lining and endanger the operation safety of tunnels. In this paper, the impact of the corrosion of the steel bolt on the structural performance of segmental joint was investigated using six full-scale segmental joint tests and a series of numerical simulation. Both the experimental and numerical results indicate that the segmental-joint performance can be divided into three stages under different loading and corrosion states. The bolt corrosion can reduce the waterproof ability, bending stiffness, and ultimate bearing capacity of the segmental joint. The impact of the bolt corrosion is most significant in the second stage. Furthermore, the bolt corrosion has a larger impact on segmental-joint performance under a positive bending moment than under a negative bending moment, owing to the configuration of the joint. The impact of the bolt corrosion is strongly dependent on the loading state of the tunnel joint and the corrosion ratio of the bolt.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
