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Extracted text: A steel pipe pile of 61 cm outside diameter with a wall thickness of 2.5 cm is driven into loose sand (D, = 30%) under submerged conditions to a depth of 20 m. The submerged unit weight of the soil is 8.75 kN/m' and the angle of internal triction is 33 The El value of the pile is 4 35 x 10 kg-em (4.35 x 10 MN-m). Compute the ground line deflection of the pile under a lateral load of 268 kN at ground level under a free head condition using the non-dimensional parameters of Matlock and Reese. The n, value from Fig. 163 for D, = 30% is 6 MN/m' for a submerged condition. %3D