Modelling issues for numerical analysis of deep excavations
نویسنده
چکیده
The influence of different modelling assumptions on the results of numerical analyses of a deep excavation problem is discussed. Based on a reference solution a comprehensive parametric study is performed, identifying modelling assumptions which may have a significant influence on the calculated displacement behaviour and the bending moments in the wall. The parameters investigated include wall friction, domain chosen for the analysis, constitutive models and modelling of the grout body. In a second example the influence of the design approaches defined in Eurocode7 for ULS-design are investigated in connection with numerical methods. It can be concluded from this study that care must be taken when setting up a numerical model because the sum of various assumptions, not considered being of large importance when looked at it individually, may significantly influence the outcome of the numerical calculation.
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