Research on Design of Large-sized Raft Foundation Based on the Interaction of Ground，Foundation and Structure

DONG Xiu-zhu; ZHANG Chen-ming

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Journal of Railway Engineering Society ›› 2007, Vol. 24 ›› Issue (4) : 20-23.

Research on Design of Large-sized Raft Foundation Based on the Interaction of Ground，Foundation and Structure

DONG Xiu-zhu，ZHANG Chen-ming

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Abstract

Research purposes: It is necessary to make research on the design of large-sized raft foundation because of the interaction of ground，raft foundation and structure，the influences on the stress and deformation of upper structure by the deformation of subgrade foundation，and the effect on the internal force and deformation of foundation by upper structure.

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.

Key words

raft foundation design / interaction of subgrade / foundation & / structure / elastic foundation beam / Winkler hypothesis

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DONG Xiu-zhu, ZHANG Chen-ming. Research on Design of Large-sized Raft Foundation Based on the Interaction of Ground，Foundation and Structure[J]. Journal of Railway Engineering Society, 2007, 24(4): 20-23

References

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