Research of deformation and force law of adjacent pile affected by surface excessive load

Based on the investigation of calculation for the pile under side load,the paper proposes the interaction analysis for the lateral displacement of the adjacent pile under ground overload,thus deriving the differential equation.The research also makes calculation program and studies internal force and deformation regulation of the passive pile.The result shows that with the increasing of the pile length,the lateral displacement of the pile top varies to smaller value;the constraint of the pile top and pile end on the lateral displacement and internal force of the pile body is shown only in a relatively small range which has no effect on other positions;lateral displacement and internal force of pile body are in linear proportion to the ground loading and in non-linear proportion to the distance between the ground loading and the pile.Therefore,it is necessary to choose a reasonable pile length and strictly limit the size of ground overload in passive pile design.