The embedded pile row has been developed to model a row of piles in the out-of-plane direction, which is available in PLAXIS 2D 2012. Pile-soil interaction is difficult to model and traditional methods in which pile rows are modelled either as plates or as node-to-node anchors have clear drawbacks. The modelling of piles in a 2D finite element model brings limitations because pile-soil interaction is a strongly 3D phenomenon. A special out-of-plane interface is developed to connect the beam with the soil nodes and represents the pile-soil interaction. The pile, represented by a Mindlin beam element, is not in the 2D mesh, but superimposed on the mesh. This is done by separating the pile and the soil. It has pile properties similar to the plate element and a continuous mesh similar to a node-to-nodeĪnchor. The embedded pile row combines the advantages of the plate and node-to-node anchor.
Some sort of pile foot modelling is needed in order to sustain axial forces in the pile, since a single node at the foot is gener-ally insufficient and leads to mesh dependent results. Moreover, a node-to-node anchor has no properties in lateral direction, which lim-its the use of this method to fully axial loaded piles only. Soil can flow independent from the pile, however, in reality there is always some sort of interaction. Using a node-to-node anchor, the soil mesh is continuous and there is no interaction with the soil. Using a plate element is therefore limited to low out-of-plane spacing Lspacing compared to the pile diameter Deq (e.g. However, the use of interface elements separates the soil mesh, which results in a minor interaction between both sides of the pile. Interface elements are used to manipulate the pile-soil interaction.
To properties per unit width in out-of-plane direction. Both methods have some advantages compared to each other, but both also have clear drawbacks: Plate elements have pile properties, converted 10 Plaxis Bulletin l Autumn issue 2013 l In the past, plates and node-to-node anchors have been used to model piles in PLAXIS 2D.
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