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Piles 

GEO5

Geotechnical software

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Piles resting on stiff subsoil

The basic assumption of the analysis is the determination of the load at the shaft resistance activation Rsy. At this point the shaft resistance no longer increases. Further loading is taken by the pile base only:

where: Rs - pile shaft resistance
β - load transferred to pile base coefficient

The load transferred to the pile coefficient β is provided by:

where: β0 - tip load proportion for incompressible pile
Ck - corrective coefficient for pile compressibility
Cν - corrective coefficient for influence of Poisson´s number of soil
Cb - corrective coefficient for stiffness soil stratum

,,

The corresponding settlement at shaft resistance activation sy is given by:

where: I - settlement influence coefficient
Es - deformation modulus of soil or secant deformation modulus of soil along pile shaft
d - pile diameter
Rsy - load at the shaft resistance activation


The settlement influence coefficient I is written as:

where: I0 - base settlement influence coefficient
Rk - corrective factor for pile compressibility
Rb - corrective factor for stiffness soil layer
Rv - corrective factor for Poisson´s number of soil

The total limit settlement follows from:

where: I - settlement influence coefficient
Rbu - pile base bearing capacity
β - load transferred to pile base coefficient
d - pile diameter
Es deformation modulus of soil or secant deformation modulus of soil along pile shaft



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