Redo Problem 12.10 using the l method for estimating the skin friction and Meyerhofs method for the

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Redo Problem 12.10 using the l method for estimating the skin friction and Meyerhof’s method for the point load estimation.


Problem 12.10

A concrete pile 15.24 m long having a cross section of 406 mm × 406 mm is fully embedded in a saturated clay layer for which gsat = 19.02 kN/m3, ϕ = 0, and cu = 76.7 kN/m2. Determine the allowable load that the pile can carry. (Let FS = 3.) Use the α method Eq. (12.61) and Table 12.11 to estimate the skin friction and Vesic’s method for point load estimation.


Eq. (12.61)

2, = Efp AL = Eac,p AL


Table 12.11

Variation of a (Interpolated

Values Based on

Terzaghi et al., 1996)

cu/pa ……………………………. α

≤ 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/m2

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Principles Of Foundation Engineering

ISBN: 9781337705028

9th Edition

Authors: Braja M. Das, Nagaratnam Sivakugan

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