Vertical settlements are calculated using the Davis-Poulos method, according to which the pile is considered as rigid (undeformable) embedded in an elastic medium, semispace, or layer of finite thickness.
The hypothesis considers that the interaction between pile and soil is constant for each (n) cylindrical segments in which the pile side surface is subdivided.
The settlement of the i th surface due to the load transmitted by the pile to the soil along the j th surface may be expressed as:
where:
τj = Increment in tension at the mid point of the segment.
E = Elastic modulus of the terrain.
B= Diameter of the pile.
Ii,j = Coefficient of influece.
Total settlement is obtained by the sum of Wi,j for all j areas.
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