Using the data in Problem and the AASHTO resistance factors, compute φPn.
Problem
A 500 mm diameter closed-end steel pipe pile is to be driven to a depth of 17 m into the following soil profile:
Depth (m) | Soil Classification | Unit Weight, γ (kN/m3) | Friction Angle, φ′ (deg) | OCR |
0–2.0 | Silty sand | 19.0 | 28 | 4.5 |
2.0–6.5 | Fine to medium sand | 19.5 | 31 | 3.5 |
6.5–16.0 | Silty sand | 19.1 | 29 | 2.5 |
16.0–17.5 | Well graded sand 19.8 | 35 | 1.5 |
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No predrilling or jetting is to be used. The groundwater table is at a depth of 5.5 m. Compute the toe bearing capacity, q′n At.
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