Abstract

In designing foundations, in case of heavy structural loads, the most comprehensive option is to use a combination of two systems of raft and pile group, which are called "piled Raft foundation”. As the behavior of the set is of the type of extensive interaction behavior between soil, piles and foundations, their analysis is complex, so far, several methods have been suggested for the analysis of bearing capacity and distribution of forces between the components of these systems. These methods include manual and computer methods. In most of these methods, the bearing capacity of the Raft, which has a significant portion, is generally ignored. Also, determining the parameters used in these methods, such as the hardness of the piled raft or  the pile group, is practically associated with many problems or is sometimes impossible. In this study, after introducing the methods presented by the researchers, a method for analyzing the internal forces and the distribution of forces between the Raft and the pile group according to the settlement analysis and interaction performance as an equivalent block, has been proposed. In the following, the behavior of the piled raft system will be studied, and the internal forces will be examined and analyzed in detail, in order to obtain a safer and more efficient design.