Settlement calculation of two-directional reinforced composite foundation

The horizontal geosynthetic reinforced mattress located on the top of vertical piles is idealized as a foundation beam,while the vertical piles and the surrounding soil are idealized as an elastic spring system.Based on the theory of the Winkler elastic foundation beam and with consideration of the interactional resistances on the interfaces up and down of the reinforced mattress,a deformation equation of the reinforced mattress is established;and its power series semi-analytical solutions are proposed.The presented method can consider the effect of the tensional force of the horizontal reinforcement on the settlement of the composite foundation.The study results indicate that the installation of the geosynthetic reinforcement in the mattress has a contribution to control foundation settlements.