This paper presents an in-plane structural analysis of a large-diameter curved tunnel during its construction stage that is performed using the finite element method. Tunnel rings and soil effects are simulated based on a beam-spring approach. Additionally, the nonlinear material properties of the mechanical behavior of the tunnel’s circumferential joints are considered and combined in the model. The internal force and deformation characteristics of tunnels with radii of curvature of 500 m and 700 m are calculated and compared. The results indicate that a larger radius of curvature produces a higher internal force and greater deformation; the position at which the maximum internal force occurs differs for the two tunnels. The results presented here may provide guidance for the design and protection of similar tunnels.
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Translated from Osnovaniya, Fundamenty i Mekhanika Gruntov, No. 2, March-April, 2023.
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Zhang, Y.C., Zhang, M.X., Ling, Y.F. et al. Structural Behavior of an In-Plane Curved Tunnel Based on Beam-Spring Approach. Soil Mech Found Eng 60, 119–124 (2023). https://doi.org/10.1007/s11204-023-09872-5
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DOI: https://doi.org/10.1007/s11204-023-09872-5