This paper presents the findings of a study to assess the influence of building stiffness on tunneling-induced ground movement for comparison with prior results reported by Potts and Addenbrooke (1997). This is accomplished through 2D numerical simulations using the Hardening Soil family of constitutive models. Input parameters of the Hardening Soil (HS) and Hardening Soil Small (HSS) models were calibrated for the case of London Clay and are compared with the prior analyses which used a nonlinear elastic soil model proposed by Jardine et al. (1986) (referred to as PJ model). Results have indicated that the choice of soil model has an important influence on the prediction of greenfield ground movements. The HSS model with the selected set of stiffness parameters provides a reasonable fit with the PJ model and matches closely the greenfield settlement trough expected from empirical data. Using the calibrated HSS soil model, we obtain modification factors for the deflection ratios and horizontal strains of a surface structure, represented as an equivalent deep beam. While the results are broadly consistent with the prior design approach, there are differences in quantitative predictions of damage that suggest the need for more refined site specific predictions for critical structures.
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