Unformatted text preview: GPa and an area ratio RA=0.2. (1) Calculate the allowable working load of the pile. A safety factor of 3 is required. (2) Estimate the settlement of the pile under the allowable working load. 3 As shown in the sketch, a group of seven hollow piles with a flexible cap is arranged in a circle. All the piles are floating concrete piles with a diameter of 1m and cast in place with 15 meters imbedded into sand. The sand is 30 meters above rock bed. No water exists within the layer. Assume that the sand Young’s modulus is Esoil=20 MPa, and Poisson’s ratio is 0.25, a total weight of 20 kN/m 3 . The Young’s modulus of steel pile is Epile = 20 GPa and an area ratio R A =0.5. Suppose the load of the pile group is uniformly distributed among the piles, estimate the settlement of the pile in the centre if the pile group is to carry a working load of 4500 kN. D g = 8m...
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 Spring '09
 ZheeenLing
 Kilogram, steel pile

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