عنوان مقاله [English]
This study tried to investigate the importance of considering deformations in the surroundings of the excavation and the effect of these displacements on surrounding structures. In this context, the stiffness impact of adjacent structure on the ground movement resulting from excavation will be determinative because the fundamental problem of excavation in urban areas with old and even new buildings (including structurally weak buildings) is the impact of the various stages of excavation on adjacent structures and vice versa the interaction of excavation of adjacent structure. Several factors affect the behavior of excavation system such as modeling of structures adjacent to the excavation site which depends on the weight, geometry and stiffness of adjacent structure. Various studies have been conducted by various researchers in this field. Horodecki et al  have shown that in excavation done in urban areas, vertical displacement of soil level around the pit and adjacent structures can be seen better than the horizontal displacement of braced wall during the construction process. Accordingly, this study investigates this matter in various parts of the city of Ilam. For this purpose, after sampling the running projects in different parts of the studied areas (Ilam city) and conducting necessary tests and determining the behavioral parameters of soil in these areas (with the help of correlation equations), a set of finite element analysis is done. Behavioral model for soil is hardening soil model. To consider the stiffness impact of the adjacent structure the concrete building with moment frame system with real geometry and loading is used. Since the geotechnical software cannot model the structure with complete details, to achieve these goals, the interaction of two programs of Etabs and Plaxis finite element are used.