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 pile foundations supporting existing structures nearby.In this paper

by using the explicit finite difference code FLAC

3D

the behavior of pile adjacent to multi-braced excavation is investigated.The modified-cam clay constitutive model is employed to model the non-linear stress-strain soil behavior

and the pile is assumed to have linear elastic behavior.The interface model incorporated in FLAC

3D

code has been used to simulate the soil/pile contact.In "standard"problem

the effects of different pile he

ad constraints on the pile response are investigated

the effects of lateral deflection of the wall

distance from the excavation face

pile stiffness

pile length and axial load on the pile response are also investigated when the pile head is free.The research finding is compared with other published case history and reasonably good agreement is found between them and could be valuable for the design and construction of the excavation.