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为深入分析路堤下CFG桩复合地基的承载特性,基于某路堤工程背景建立了CFG桩复合地基的平面有限元分析模型。模型采用导入初始地应力法模拟了初始应力场,利用“生死单元法”模拟了路堤分层填筑过程。有限元计算与实测曲线的对比验证了有限元模型及参数的正确性与合理性,并以此为基础分析了CFG桩复合地基的应力及变形,最后对CFG桩复合地基承载特性的相关影响因素进行了探讨,获得了一些有益结论,对实际工程具有一定的参考意义。
In order to deeply analyze the bearing characteristics of CFG pile composite foundation under embankment, a planar finite element analysis model of CFG pile composite foundation was established based on the background of a embankment. The model simulates the initial stress field by introducing the initial stress method and simulates the embankment stratification and filling process by using the method of unit life and death. The comparison between the finite element calculation and the measured curve verifies the correctness and rationality of the finite element model and the parameters. Based on this, the stress and deformation of the CFG pile composite foundation are analyzed. Finally, the influence factors of the bearing capacity of CFG pile composite foundation Have carried on the discussion, has obtained some beneficial conclusions, has certain reference significance to the actual project.