Abstract:Basement excavation work for a new building would result in soil movement behind the retaining structure. The soil movement might induce considerable bending moment and deflection on the pilefoundations supporting existing structures nearby. In this paper, by using the explicit finite difference code FLAC3D, the behavior of pile adjacent to multi-braced excavation is investigated. The modified-cam clay constitutive modelis employed to model the non-linear stress-strain soil behavior, and the pile isassumed to have linear elastic behavior. The interface model incorporated in FLAC3D code has been used to simulate the soil/pile contact. In “standard” problem, the effects of different pile head constraints on the pile response areinvestigated, the effects of lateral deflection of the wall, distance from theexcavation face, pile stiffness, pile length and axial load on the pile responseare also investigated when the pile head is free. The research finding is compared with other published case history and reasonably good agreement is foundbetween them and could be valuable for the design and construction of the excavation.