Excavation-Adjacent Structure Interaction Effect on Excavation Analysis in Urban Aria

Excavation in urban plans influences the adjacent buildings and sometimes creates the irreparable damages. In this regard the effect of adjacent structure stiffness on the ground movement due to excavation is important. However, there are only a few studies in this area of research. In this paper, the interaction of excavation and its adjacent structure is studied using two famous finite elements codes (PLAXIS & SAP) and an elastoplastic constitutive model. For this purpose, the two excavation systems have been considered. The adjacent structure in the first system is a concrete bending frame. In the second system, instead of a real structure, an equivalent (in stiffness) elastic beam has been used. The achieved results indicate the considerable effect of adjacent structure on the ground movement due to excavation. In addition, the remarkable influence of excavation on internal forces of different members of structure is addressed. It is shown that the application of an equivalent elastic beam, which has the characteristic of simplicity and flexibility in consideration of different stiffness for a given building weight, can be used for evaluation of the interaction of excavation and its adjacent structure.