Normalised distributed components extracted from the analysis of pile C4; solid lines indicate numerical curves, dashed lines show parametric curves that are directly fitted to the numerical data: (a) distributed lateral load; (b) distributed moment. Note that the curve shown in (a) for z/D = 5·97 corresponds to a point below the pile rotation point. Although v is negative in this case, the curve has been plotted in the first quadrant for convenience