A concrete pile of section 30 x 30 cm is driven into medium dense sand with the water table at ground level. The depth of embedment of the pile is 18m. Static cone penetration test conducted at the site gives an average value q_{c}=50 kg / cm ^{2}. Determine the load transfer curves and then calculate the settlement. The modulus of elasticity of the pile material E_{p} \text { is } 21 \times 10^{4} kg / cm ^{2} (Fig. Ex. 15.26).