Research methods: The calculation and analysis were made for the entire structure by adopting three-dimensional space model for subgrade，foundation and upper structure with the aid of large finite element MIDAS program and elastic foundation beam method to simulate the effect on the foundation with spring.
Research results: The calculation results show that the computed settlement regulation and distribution regulation of internal force of raft foundation are matched with the actual deformation and stress of raft foundation.
Research Conclusions: The analysis results show it is feasible to design a raft foundation by taking the interaction of subgrade，raft foundation and structure into account.
2007, Vol. 24 
