Abstract
According to the typical geological conditions of Wuhan Guangzhou passenger dedicated line reinforced section by CFG pile, the FLAC3D finite difference program is used to simulate the settlement deformation characteristics of subgrade filling process. The settlement deformation is also calculated by theoretical method. By comparing the calculated results with the numerical simulation results the feasibility of the model is verified. Results show that: The uneven settlement as basin appears on the subgrade surface top. The maximum settlement is at subgrade centerline. It gradually decreases towards the slope. The settlement at shoulder is the smallest.
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