Abstract
This chapter develops a new tunnel model, by extending the Pip in Pip model to evaluate the dynamic response induced by moving loads in a shield tunnel buried in saturated soils. The tunnel lining and grouting layer is modeled as a Flügge double cylindrical shell. and the surrounding soil involving a homogenous full-space with a hollow cylinder is simulated as the saturated porous medium using Biot’s theory. The coupling of dynamic tunnel–soil interaction is solved in the frequency–wave number domain, while the time–space domain solutions are obtained by inverse Fourier transform. The proposed model is based on semianalytical solutions so it is computationally efficient. The model can be further developed by incorporating the track and vehicle so that it can be applied to guide track configuration in the design of underground railways.
Published Version
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