Simplified Method for Designing Piled Raft Foundation in Sandy Soils

Abstract

The main purpose of this study is to develop a simplified method for computing the load carried by piles, and settlement of piled raft based on the characteristics of an un-piled raft, pile group, and soil. These are important criteria for preliminary piled raft design. Based on the results obtained from finite element analysis, simplified formulas and curves are generated for different conditions of sand and different pile spacing. These formulae and curves contain the stiffness ratio and efficiency factor of the un-piled raft and pile groups. The results of the proposed method were validated using the Poulos–Davis–Randolph method.