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? ? 12.9 Determine the maximum load that can be allowed on the 450 mm diameter pile shown in Figure P12.9, with a factor of

(12.20). Q, a N? Cu Ap = 9c, Ap

Table 12.11. Variation of a (Interpolated Values Based on Terzaghi et al., 1996) ?? -Pa a< 0.1 1.00 0.2 0.92 0.3 0.82 0.4 0.

1.4 0.40 1.6 0.38 1.8 0.36 2.0 0.35 2.4 0.34 2.8 0.34 ?

12.9 Determine the maximum load that can be allowed on the 450 mm diameter pile shown in Figure P12.9, with a factor of safety of 3. Use the a method and Table 12.11 for determining the skin friction and Eq. (12.20) for determining the point load.

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