Pile Foundation


With the program Pfahl+, the internal and external load-bearing capacity of bored piles with rectangular and circular cross-sections can be verified.

Both the soil settlements in the vicinity of the pile and, derived from this, a negative skin friction as well as the lateral pressure acting on the piles can be taken into consideration. The axial pile resistances, due to skin friction and end-bearing pressure, can optionally be determined either by evaluating static or dynamic pile test loads or based on empirical values given by the recommendations of the pile work group “EA-Pfähle” separately for the serviceability limit state (SLS) and the ultimate limit state (ULS).

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Discover now more programs from the section Soil Analysis!

Structural system

Basic parameters:

  • Active/interactive reinforced concrete design
  • Uplift resistance verification of tension piles, if applicable
  • Optionally selectable automatic stress adaptation

Structural system:

  • Definition of pile groups to derive the actions from lateral pressure
  • Definition of the pile system (cross-section, shaft length, toe expansion, if applicable)
  • Definition of the pile material (optionally with creep effects)
  • Durability verification via exposure classes


  • Any number of horizontal layers
  • Freely selectable soil parameters
  • Assignment to soil types (backfill, soft layer, bearing layer)
  • Special parameters for the calculation of settlements and negative skin friction (via total or effective stresses)

Ground surface:

  • Horizontal ground top edge


  • Stagnant groundwater can optionally be taken into account. The buoyant unit weight of the water-saturated soil is automatically considered.
  • Any pile loads in the form of vertical or horizontal head loads or head moments along the two main axes. Free assignment to types of actions according to EC 0 and to concurrency and alternative groups, if applicable.
  • Optionally, a surface load can be defined in the immediate vicinity of the pile.
  • Via interface to the program Soil Settlement SBR+, the soil settlement in the pile vicinity and, optionally, the generated negative skin friction can be calculated automatically.
  • Via interface to the program Earth Pressure EDB+, optionally, an action caused by lateral pressure due to flowing soil can be calculated automatically.



The individual load cases are automatically superimposed and the decisive design combination is assigned to each verification.

  • Optional non-linear design in a second-order analysis with non-linear internal forces and material behaviour
  • Continuous reinforcement over the total length or over specific sections
  • Special setting options for serviceability (minimum eccentricities, min As for compression members)
Axial pile resistances
  • Determination by specifying characteristic total resistances (separately for compression and tension)
  • Evaluation of static pile test loads (data-entry dialog and automatic/specific evaluation of any number of measuring series) → Resistance-settlement curve
  • Evaluation of dynamic pile test loads (data-entry dialog and automatic/specific evaluation of any number of measuring series) → Resistance-settlement curve
  • Determination of the resistance-settlement curve from empirical tabular values for end-bearing pressure and skin friction specified in the recommendations of the pile work group “EA-Pfähle”
Lateral pile resistances

Determination by specifying subgrade reaction moduli and subgrade areas:

  • Automatic derivation of the subgrade from soil layers and soil properties
  • User-defined subgrade areas
  • Optional automatic modification and setting of the subgrade areas with calculation functions (constant, linear, parabolic)
  • Automatic inclusion of the two- and three-dimensional earth resistances in the subgrade areas
  • User-defined specification of the greatest permissible displacements in the three main directions and as a resultant
Document file formats
  • PDF
  • Word
  • Printer
  • Comparison of pile settlement and soil settlement with representation of the neutral points in the serviceability and ultimate limit states for the derivation of negative skin friction
  • Mapping of the resistance settlement curve for the end-bearing pressure, the skin friction, and the pile bearing capacity derived from empirical values or test loading
  • Design internal forces for compression and tension piles in the serviceability limit state SLS and the ultimate limit state ULS.
  • Mobilised subgrade stresses, both in the direction of the main axes and as a resultant
  • Superposition of the subgrade stresses with the earth resistance to represent the required stress limitation and the relocations of the subgrade stresses to greater depth if applicable.
  • Deformation of the pile along the main axes and as a resultant in the SLS
  • Representation of the selected and required reinforcement
Transfer options
  • Soil Settlement SBR+ (calculation of the decisive settlement in the pile environment to determine the negative skin friction)
  • Earth Pressure Calculation EDB+ (calculation of the decisive lateral earth pressure and the earth resistances)
  • Reinforced Concrete Column B5+ (calculation of the pile as a column on elastic foundation in accordance with the subgrade reaction modulus method)
Geotechnical standards
  • DIN EN 1997
  • ÖNORM EN 1997
  • DIN EN 1992
  • ÖNORM EN 1992
  • BS EN 1992

Support resources