The　issue　to　which　should　be　play　attention　is　the　detrimental　effect　of　excavation-induced　soil　movement　on　adjacent　piles.　The　additional　deflections　and　bending　moments　of　the　pile　shaft　are　generated　due　to　soil　lateral　movement.　This　may　lead　to　their　superstructures　distress　or　failure.　The　geotechnical　finite　element　numerical　analysis　software　Plaxis　8.2　is　used　to　simulate　the　process　of　excavation;　and　the　effects　of　many　factors　on　the　behaviors　of　adjacent　piles　are　investigated,　including　excavation　depth,　stiffness　of　diaphragm　wall,　stiffness　of　pile,　net　distance　between　excavation　and　pile,　constraint　conditions　of　pile　head,　length　of　pile.　The　behaviors　of　lateral　displacements　and　bending　moments　of　piles　are　studied　in　detail.