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Because of its good economic and social benefits, CFG pile composite foundation is widely used in industrial and civil buildings. In recent years, with the rapid development of high-speed railway, CFG pile composite foundation, Because of its marked effect sedimentation control, began to be extensively employed in high-speed railway foundation treatment.However, high-speed railway subgrade is different from the traditional architectural foundation, High-speed railway subgrade is a flexible foundation, And the load is also different from traditional architectural Foundation, the theory of CFG pile composite foundation that Under the railway embankment load is still not perfect, and lag behind in production, so to carry out research of CFG pile composite foundation under the embankment load, especially research in settlement calculations, is very necessary.This paper aims on the calculation method of settlement about CFG pile composite foundation under embankment load, the structure in the paper made the following arrangements:The first chapter describes the topics of the background and the Research Status of CFG pile composite foundation; Second chapter analyzes the advantages and disadvantages of various methods of settlement calculation of composite foundation, and highlights the Standardized method of settlement calculation of CFG pile composite foundation, and apply it to the embankment load, and, based on the standard method, presented the recommended settlement calculation method of CFG pile composite foundation under embankment load, In addition, achieved its computerization;Third chapter gives a detailed description of on-site tests, and take research and analysis of test results, get the results on the hierarchical settlement pattern of CFG pile composite foundation under embankment load,namely, the settlement of CFG pile composite foundation under embankment load is mainly generated by the subjacent bed in the deep soft soil zone, its subjacent bed thickness is approximately equal to 1.6 times the reinforcement area;Fouth chapter start form the finite element numerical simulation, carried out numerical simulation of field tests, obtained that the simulation results is a relatively reliable; fifth chapter comparied the results of various methods, obtained that the recommended method have high accuracy, and the calculation is simple, therefore recommended the method as the computing model of CFG pile composite foundation under embankment load.
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