Abstract
The soil body of the shield end could be unstable and should be reinforced, and its thickness affects the stability and economy of engineering. The existing elastic thin plate model was too conservative for design. A modified elastic plate model was proposed for the calculation. Based on elastic finite element analysis data, optimal fitting was conducted for the proposed elastic model, and the coefficients of the model were obtained. A case study showed that the elastic thin plate model is too conservative when used to calculate the thickness of the reinforced soil body. The actual reinforced thickness in practice is between the values of the elastic thin plate model and the modified elastic plate model.
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