Elastic Analysis of Single Pile-Rigid Circular Raft Systems in Layered Soils

Piled raft systems have been commonly used for supporting buildings and other superstructures. In most applications, piles are installed in layered soils. It has been a challenge how to properly analyze the behavior of piled raft systems in layered soils. This paper presents a methodology for analyzing an axially loaded single pile-rigid circular raft system in layered soils based on the extended Sneddon and Muki solution for layered elastic media. Field test results for a single pile-rigid raft system at the F1 motor raceway site in Shanghai, China were used to verify the proposed method. The comparison indicates that the proposed method can reasonably predict the elastic behavior of the pile-raft system. This study also demonstrates an obvious difference in side resistance along the pile in layered soils with or without a rigid raft.