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Failure mechanism and strengthening effect of shield tunnel lining reinforced by steel plates with corbels

Liu, T-J, Chen, S-W, Lin, P-Q and Liu, H ORCID: 0000-0002-5437-4695 2020 , 'Failure mechanism and strengthening effect of shield tunnel lining reinforced by steel plates with corbels' , European Journal of Environmental and Civil Engineering , pp. 1-19 , doi: 10.1080/19648189.2020.1717636.

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Abstract

This study investigates the failure mechanism and strengthening effect of ashield tunnel lining structure reinforced via steel plates with corbels. Adetailed three-dimensional (3D) numerical model is established for thestaggered-joint segmental lining structure of an actual shield tunnel in theKunming metro-system, which is then validated via a full-scale simulationexperiment of the shield tunnel segmental lining structure. Then, the actualloading conditions of the staggered-joint shield tunnel segmental liningstructure in the Kunming metro-system are simulated, and the mechanicalresponses of the segmental lining are analysed in terms of the variation inits diameter, opening amount of the joints and stress of the bolts. Theultimate load-bearing capacity of the lining structure reinforced using steelplates with corbels is improved to 610 kN, which is 41.9% higher than theunreinforced structure with an ultimate load-bearing capacity of 430 kN.Moreover, the strengthening effect of the reinforcement using steel plateswith corbels is discussed considering actual field monitoring data andother reinforcement methods. It is concluded that the results of this papercan provide an effective reference for similar reinforcement schemes ofshield tunnels. The defined classification criteria can be adopted to determine the deformation stage of reinforced shield tunnels.

Item Type: Article
Authors/Creators:Liu, T-J and Chen, S-W and Lin, P-Q and Liu, H
Keywords: failure mechanism, numerical simulation, shield tunnel, steel plate with corbel, strengthening effect
Journal or Publication Title: European Journal of Environmental and Civil Engineering
Publisher: Taylor & Francis
ISSN: 1964-8189
DOI / ID Number: 10.1080/19648189.2020.1717636
Copyright Information:

Copyright 2020 Informa UK Limited, trading as Taylor & Francis Group

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