I guess this equation is for the empirical calculations. Not for FEM or FDM! 7[(<t+
+4K'KpFzZ
Normally, the pile is simpilified by beam element in plain strain condition in FEM. T2k# "zD
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Using the EI of pile divided by spacing with ignoring soil stiffness (because it is very small compared to concrete or steel pile). /x&52~X5-
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BTW, if you really want to discuss something, please post the question or problem clearly, otherwise nobody can help you or discuss this.