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.