Influence of the interface modelling in numerical simulation of tied-back excavations
Influencia de la modelación de la interfase en la simulación numérica de excavaciones con muros diafragma anclados
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In terms of numerical modeling, one of the aspects that mainly affects the earth pressure values of tie-back excavations is the friction or adhesion that is generated at the interface between the soil and the retention structure material (generally concrete). Typically, software providers based on the finite element method establish that the roughness value does not have a major influence on the results. However, when comparing the output data, in numerical simulations, this is not necessarily entirely true. Generally, this factor is simulated in the programs relating the interface strength with the soil strength. The current contribution aims to validate the influence of the variation of different parameters related to roughness or friction on the results of earth pressure in an anchored diaphragm wall. The results show high variations, with a high dependence on the mentioned parameters that are related to the modeling of the interface.
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