Deformation Analysis And Settlement Prediction Of Combined With The CFG And MIP Pile Composite Foundation

With the example of the New Station of YingKou,of which high-speed railway from Dalian to Harbin with the Cement Fly-ash Gravel pile (CFG) and the Soil cement mixing pile (MIP) pile Combined with the deep-thick soft of the engineering practice. Through the measured settlement, lateral displacement data collation, A variety of field data is analysised for studying the settlement deformation laws of the embankment body, reinforcement area and the below area. That the settlement of composite foundation has completed about 76.22% of the total settlement at the end of load; After the foundation laying;Composite foundation, the settlement of reinforced area 26.04% of the total settlement, and settlement of underlying layer 73.96% of the total settlement, so the composite foundation settlement mainly from the underlying layer.Combining field test data, post-settlement prediction, a reasonable guide the construction progress, real-time control law of subgrade settlement, a large number of literature are summarizes in this paper.based on the theory proposed by using the gray Verhulst model with the rigid-flexible of long-short pile composite foundation for this prediction, compared with exponential curve, the hyperbolic method. Grey Verhulst model prediction accuracy than the traditional exponential curve, hyperbolic prediction accuracy is higher and more reliable By comparison shows.Numerrical simulation are carried out on Settlement of MIP with CFG pile composite foundation by using the finite element method (FEM) software of plaxis, Get a better result, and with the experimental data and theoretical calculations are compared, and further illustrates the reliability of theoretical predictions of gray. So Grey Verhulst model and finite element software plaxis prediction of settlement is feasible, has a good guide to the practical for the project.