APPLYING HYPOPLASTIC MODEL FOR SOFT SOILS TO THE ANALYSIS OF ANCHORED SHEETING WALL

摘要

This paper is concerned with a practical application of the hypoplastic constitutive model for soft soils. In particular, two specific implementations, so called standard and the one based on small strain theory, are considered and the resulting predictions are compared with those provided by the Mohr-Coulomb model. As an example, we considered an anchored underground wall built during the construction of extension of the line A of Prague's subway. The results of all numerical simulations obtained with the help of Geo5 FEM software were also compared with in situ measurements with attention devoted mainly to the evolution of deformation of the underground wall and of pre-stressforces of rope anchors. It is shown that extended formulation of the hypoplastic model accounting for high stiffness of soil at very small strains should be adopted to arrive at reliable and meaningful predictions of the soil response.