Use of Numerical Method for Simulating the Construction of an Anchored Wall. | METODO NUMERICO IMPIEGATO PER LA SIMULAZIONE DELLA COSTRUZIONE DI UNA PARETE ANCORATA.

A numerical approach, based upon the finite element method (FEM), which allows the behavior of rock slopes artificially supported with anchorages to be analyzed, is presented. The technique offers the designer an analytical tool which can properly simulate many of the complex facets of anchored walls. The construction sequence (e. g. excavation, installation and prestressing of anchorages, subsequent excavation, etc. ) is broken into a series of analyses to be performed with FEM. Each analysis establishes the conditions to be accounted for in the next one. Soils and rocks are modeled as nonlinear elastic materials. Both bilinear and hyperbolic constitutive laws can be used. Materials which exhibit strain softening behavior are applicable. The nonlinearly elastic problem is solved by the initial stress method. The anchorages are represented in the model by one-dimensional elements. The simplifying assumption is made that the wall can be simulated by plane strain conditions.