D-Pile Group

D-Pile Group enables the analysis of the three-dimensional behaviour of single piles and pile groups, interacting via the pile cap and the soil, as a function of loading. For this purpose D-Pile Group offers a unique combination of the internationally accepted design rules of the API (American Petroleum Institute) and special soil interaction models all within the same graphical user interface.


One of the great benefits of D-Pile Group is that switching between different computational models is very easy since all relevant input data of the previous model is kept. This flexibility gives the user the opportunity to choose between a fast and simple calculation and a more complex but more accurate calculation, in a way that best suits particular needs. The choice of models that can be used depends primarily on the distance between piles.

Some specific features of D-Pile Group are:

Scherm paaleigenschappen


  • Analysis of all pile types, both pre-defined standard or userdefined special piles.
  • Pile sections with different properties.
  • Options for inclined piles (Cap, Cap Soil Interaction module and Dynamic module).
  • Pile head fixed or hinged clamp in the pile cap ( freely rotating).

Soil resistance

  • Automated spring generation according to the API for sand and clay layers, for static or cyclic loading, with common input properties.
  • Influence of the pile tip resistance (elastic or elasto-plastic).


  • Load on the cap by moments, horizontal and vertical forces, rotations and displacements.
  • Load by horizontal and vertical soil displacements (Cap module).
  • Effect of surcharge (Cap Interaction module).
  • Monotonous increasing loads, load reversal and repeated (cyclic) loads.
  • Dynamic load by ship collision (Dynamic modulel), a model for undrained behaviour of sand.
  • Multiple models for the interaction between piles via the soil.

Output facilities

  • Graphical output of displacements, shear forces and moments in top view.
  • Graphs of cap displacements and rotations versus loading.
  • Graphs of internal forces and soil reactions along the piles.
  • Automatic generation of a calculation report with tables and graphs in rich text format. Exporting plotted data (e.g. to Excel).

D-Pile Group comes as a standard module, which can be extended further with other modules to fit more advanced applications

Combining methods and models in 1 programme

Many different methods exist to perform calculations on single horizontally loaded piles and pile groups. Each method has its own advantages and its limitations. Therefore, Deltares build a computer program (1988) for practical use that would hold several of these calculation models. The great advantage would be that the user could switch from one model to another, using the same input when applicable. Previous releases of D-Pile Group were called MPile.

For the 3D modelling of pile groups two issues are important. First of all the behaviour of individual pile(s) in their own ground profile is taken into account. Secondly one has to account for the behaviour (interaction) that each pile imposes on all other piles through the soil and through a superstructure. These issues are addressed in D-Pile Group using different models that range from a standard model to more complex models.

How to obtain D-Pile Group?

Service Packages

The latest fully validated release is D-Pile Group 18.1. This version is available if you have purchased a Service package. You can order a Service package via our Software sales Service team (software@deltares.nl). The software can be downloaded via our Download portal. You don’t need a license file to do this. You can use the software in Demo mode without a license file.
By purchasing a Service package you will receive a license file to unlock full functionality (according to purchased package). Our Software sales Service team will provide you with instructions on how to get the software working with a license file.

Online Software

You can also use our Geotechnical software products via the internet (Software as a Service – SaaS), on subscription basis. For more information, please see Online Geotechnical Software