Solve Problem 12.25 using the modified EN formula. (See Table 12.17.) Use FS = 3.

Problem 12.25

A steel H-pile (section HP330 × 149) is driven by a hammer. The maximum rated hammer energy is 54.23 kN ∙ m, the weight of the ram is 53.4 kN, and the length of the pile is 27.44 m. Also, we have coefficient of restitution = 0.35, weight of the pile cap = 10.7 kN, hammer efficiency = 0.85, number of blows for the last 25.4 mm of penetration = 10, and E_p = 207 × 10⁶ kN/m². Estimate the pile capacity using Eq. (12.122). Take FS = 6.

Eq. (12.122)

Table 12.17

Transcribed Image Text:

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