The new Design Guideline Basal Reinforced Piled Embankments can be purchased at Taylor&Francis Group/CRCPress, Amazon or Bol.com. This paper provides a summary and this excel file gives the main equations.
Prof. Richard Bathurst has written a review of our design guideline. You can read it here, with free access on the Geosynthetics International website.
Suzanne van Eekelen received her PhD on basal reinforced piled embankments on 1 July 2015.
For the doctorate, the Deltares laboratory carried out a series of experiments, reported in Van Eekelen et al., 2012a. Based on this, Van Eekelen developed the new Concentric Arches - design model for the basal reinforcement of the piled embankment (Van Eekelen et al., 2012b, Van Eekelen et al., 2013). This model was validated with measurements from seven full-scale projects and four series of scaled model experiments (Van Eekelen et al., 2015). The calculated results are almost a perfect match with the measured results.
The Concentric Arches model. The loads are transported along the hemispheres and the 2D arches, towards the piles, the geosynthetic reinforcement and the subsoil. This model is available in excel: excel file with Concentric Arches model.
The results of the doctorate study were adopted in the 2016 update of the CUR226 Dutch Design Guideline for Basal Reinforced Piled Embankments.
A piled embankment consists of a foundation on piles, with on top of that an embankment. The bottom section of the embankment is composed of a granular material and reinforced with one or more geosynthetic layers. The embankment can be raised with sand or granular material. The piled embankment is finished with a road or a railroad construction.
Within the granular layer, a kind of arch occurs. The load is transferred along these arches. This phenomenon is called arching.
Please find a list of Dutch piled embankment projects here.
The Dutch version of Piled Embankment: Paalmatrassystemen.