Q, = Efp AL =Eac„p AL (9.59) Table 9.10 Variation of a (Interpolated Values Based on Terzaghi, Peck and Mesri, 1996) Cu Pa < 0.1 1.00 0.2 0.92 0.3 0.82 0.4 0.74 0.6 0.62 0.8 0.54 1.0 0.48 1.2 0.42 1.4 0.40 1.6 0.38 1.8 0.36 2.0 0.35 2.4 0.34 2.8 0.34 Note: Pa = atmospheric pressure = 100 kN/m? or 2000 lb/ft?
Q, = Efp AL =Eac„p AL (9.59) Table 9.10 Variation of a (Interpolated Values Based on Terzaghi, Peck and Mesri, 1996) Cu Pa < 0.1 1.00 0.2 0.92 0.3 0.82 0.4 0.74 0.6 0.62 0.8 0.54 1.0 0.48 1.2 0.42 1.4 0.40 1.6 0.38 1.8 0.36 2.0 0.35 2.4 0.34 2.8 0.34 Note: Pa = atmospheric pressure = 100 kN/m? or 2000 lb/ft?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A concrete pile 50 ft long having a cross section of 15 in. x 15 in. is fully embedded in a saturated clay layer for which γsat = 121 lb/ft3, Φ = 0, and cu = 1600 lb/ft2. Determine the allowable load that the pile can carry. (Let FS = 3.) Use the a method Eq. (9.59) and Table 9.10 to estimate the skin friction and Vesic’s method for point load estimation.
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