Numerical Finite Element Analysis of the Behavior of Structure Near to Deep Excavations in Urban Area

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The aim of this paper is to study the effect of deep excavations on the structure behavior on the soil surface. To better explain the interaction between the main elements (excavation, soil, retaining wall and structure), a numerical approach based on the finite element method is used. This allows taking into account the excavation stages, the structure and its foundations. An elastic-plastic constitutive law based on the Mohr-Coulomb criteria is used to describe the soil behavior, and contact soil-retaining wall is modeled by interface elements. Parametric studies according to the influence of the position of the structure according to the deep excavation and its flexibility are performed. A comparison with classical approaches which decouple the problem of interaction soil-excavation-structure is also proposed.
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Deep Excavations; Elastic-Plastic; Flexibility; Interaction; Structure

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