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GEO5

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Coefficients of pile bearing capacity

Recommended ranges of values of coefficients of pile base resistance Np and coefficient β are listed in the following table. The coefficient β is usually found in the given range, it seldom exceeds the value 1,0.

Range of coefficients Np and β (Fellenius, 1991)

Type of soil φef Np β
Clay 25 – 50 3 – 30 0,23 - 0,40
Silt 28 – 34 20 – 40 0,27 - 0,50
Sand 32 – 40 30 – 150 0,30 - 0,60
Gravel 35 - 45 60 - 300 0,35 - 0,80


Literature:

Felenius, B.H.: Foundation Engineering Handbook, Editor H.S. Fang, Van Nostrand Reinhold Publisher, New York, 1991, 511 - 536




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