A simple analytical solution is outlined for computing the lateral dynamic pile-pile interaction of floating pile groups in layered soil media. A dynamic Winkler model utilizing the finite-element based spring and dashpots is adopted for the effect of pile-soil interaction

combining with a transfer-matrix formulation in the case of multi-layered soils. Pile-soil-pile interaction is considered by assuming interaction between the receiving pile and the surrounding soil. It is demonstrated that the prediction of simplified method is in good agreement with rigorous numerical solutions. Attention is then given to the effect of several factors

such as pile length

tip constraint

angle between piles and soil media; and some interesting features such as “influencing pile length” are also shown.