3.1B As shown in the sketch, a group of 5 hollow piles with a free standing cap is arranged in a circle with a radius of 2.1. All the piles are floating concrete piles with a diameter of 0.9 m and cast in place imbedded into sand a ratio between pile length and pile diameter of 10. The sand thickness is 31 meters above rock bed. No water exists within the layer. Assume that the incompressible sand Young's modulus is Esoil-2125 MPa, a total weight of 20 kN/m'. The Young's modulus of concrete pile is Epile - 40 GPa and an area ratio R =0.6. The pile group is to carry an ultimate load of 12486 kN with factor of safety of 3; and the load of the pile group is supposed to be uniformly distributed among the piles, the interaction factor between two pieci 0.4. Assume 3.14 lar Determine the settlement influence factor of an individual Pile (1 mark) Radius (m) Pile Sand Sand Ultimate Factor of diameter Young's thickness load (kN) Safety (m) modulus (m) (MPa) 1.1 2125 12486 31 0.9 B 14 3.2B Determine the correction factor (Rn) for a uniform layer of soil of finite depth above a rigid base (1 mark) Oy Radius (m) Pile Sand diameter (m) Young's modulus (MPa) Sand thickness (m) Ultimate load (kN) Factor of safety 2.1 0.9 2125 31 12486 0.4 Sand 3.3B Determine the settlement of a single pile under allowable load which is shared equally within pile group in m. (2 mark Radius (m) Pile Sand Ultimate Factor of diameter (m) Young's thickness load (kN) safety modulus (m) IMPa) 2.1 2125 0.9 37 12486 3 0.4 3.1B As shown in the sketch, a group of 5 hollow piles with a free standing cap is arranged in a circle with a radius of 2.1. All the piles are floating concrete piles with a diameter of 0.9 m and cast in place imbedded into sand a ratio between pile length and pile diameter of 10. The sand thickness is 31 meters above rock bed. No water exists within the layer. Assume that the incompressible sand Young's modulus is Esoil-2125 MPa, a total weight of 20 kN/m'. The Young's modulus of concrete pile is Epile - 40 GPa and an area ratio R =0.6. The pile group is to carry an ultimate load of 12486 kN with factor of safety of 3; and the load of the pile group is supposed to be uniformly distributed among the piles, the interaction factor between two pieci 0.4. Assume 3.14 lar Determine the settlement influence factor of an individual Pile (1 mark) Radius (m) Pile Sand Sand Ultimate Factor of diameter Young's thickness load (kN) Safety (m) modulus (m) (MPa) 1.1 2125 12486 31 0.9 B 14 3.2B Determine the correction factor (Rn) for a uniform layer of soil of finite depth above a rigid base (1 mark) Oy Radius (m) Pile Sand diameter (m) Young's modulus (MPa) Sand thickness (m) Ultimate load (kN) Factor of safety 2.1 0.9 2125 31 12486 0.4 Sand 3.3B Determine the settlement of a single pile under allowable load which is shared equally within pile group in m. (2 mark Radius (m) Pile Sand Ultimate Factor of diameter (m) Young's thickness load (kN) safety modulus (m) IMPa) 2.1 2125 0.9 37 12486 3 0.4
