Comparative Analysis for Numerical Modelling and Design of Anchored Retaining Structures

An in-depth knowledge of the main principles governing the calculation methods implemented in the most widespread software is a key element for suitable geotechnical and structural design.This paper presents the main results of some comparative numerical analyses carried out for the design of flexible back-anchored retaining structures.The adopted codes are based on the concept of an elastic beam lying on Winkler springs and the finite element approach.The main results obtained through the different methods are shown in terms of stress, internal forces, and strains acting on the structures and the surrounding soil.Similarities and differences in results are interpreted and then compared with some outcome measurements performed on the structure during its construction phases, according to the observational method.Some basic suggestions are also provided for designers to choose the most suitable approach, taking into account complexity, type of problem, time consumption, and costs.