Computational modelling of the effect of underground excavations on adjacent structures has shown great potential to aid the assessment of tunnelling-induced damage to structures. However, the complexity of the mechanisms involved and the uncertainties connected to the use of sophisticated constitutive laws still limit the application of numerical modelling in civil engineering practice. This paper evaluates the effectiveness of soil models with different levels of complexity when predicting tunnelling-induced displacements of the soil surface, and consequently the assessment of building deformations. The performance of a non-linear elastic, a linear elastic–perfectly plastic and a critical-state-based kinematic hardening soil model were compared with the results of centrifuge testing of a tunnel excavation in sand. Results demonstrated that both the non-linear elastic and the kinematic hardening models are suitable to reproduce the effect of soil–structure interaction on the soil surface displacements and the building deformations, while also demonstrating the limitations of these methods in predicting local soil strains around the tunnel itself.

中文翻译：

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土模型对隧洞诱发结构变形预测的影响

地下挖掘对相邻结构的影响的计算模型显示出巨大的潜力，可以帮助评估隧道引起的结构破坏。但是，所涉及机制的复杂性以及与复杂本构关系法使用相关的不确定性仍然限制了数值模型在土木工程实践中的应用。本文在预测隧道引起的土壤表面位移时，评估了复杂程度不同的土壤模型的有效性，从而评估了建筑物的变形。将非线性弹性，完全弹性线性塑性和基于临界状态的运动硬化土模型的性能与砂土隧道开挖的离心测试结果进行了比较。