You can model the behavior of such pile through two approaches; 1) equivalent plate elements, 2) 3D finite elements. If you're going to consider the second approach, don't forget to check the mesh quality as you may have to impose a very fine mesh around pile endings to get an adequate mesh quality for reasonable results.
To do so, considering the second approach, draw the pile geometry and generate the mesh. Then assign the material to the cluster (s) comprising the pile.