In this paper, the piled raft foundation is supported with thin cement treated soil layer below the raft and various length of friction piles. The part of this raft has a possibility of rising to the surface by over-turning moment of the tall building during a big earthquake. The authors present the outline of designing the foundation, the comparative studies on estimated settlements and measured results, and the analysis results of the lateral resistance of the piled raft which considered the rising zone of the raft from the surface.