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Semi-analytical Solutions of Three-dimensional Ground Movements Due to Shallow Tunnelling by Lin Yu; Dingli Zhang; Qian Fang; Tong Xu; Jiwei Luo; Wenbo Chen is a Engineering article available to read on EtoBox.

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This paper presents the semi-analytical solutions to predict the three-dimensional ground movements of shallowly buried tunnels in clayey and sandy soils based on the virtual image technique. Both the ground nonuniform convergence and the tunnel ovalization are taken into account in the proposed method. The accuracy of the proposed method is verified by comparing with the results from field monitoring, numerical simulation and existing solutions. The results indicate that the transverse surface settlements mainly occur within H/tan(45° + φ/2) + R from the tunnel axis on both sides of the tunnel, and the variations of the longitudinal surface settlements are mainly produced within ± 2H from the tunnel face. The internal friction angle, Poisson’s ratio, cover depth and tunnel diameter have significant effects on the surface and subsurface movements according to the parametric analysis. The proposed method can serve as a practical tool in the preliminary design of tunnels and provide a theoretical basis for ensuring the construction safety of actual engineering.

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Author

Lin Yu; Dingli Zhang; Qian Fang; Tong Xu; Jiwei Luo; Wenbo Chen

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)