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运用有限元软件对单桩受荷时桩土模型中土体边界的选取进行了分析。详细介绍了有限元的建模过程,通过计算土体不同边界范围所能提供的桩极限承载力,得出计算分析单桩受荷时桩土模型所需的合理土体边界。结果表明桩土模型中桩侧土体边界取12倍桩径,桩端土体深度边界取15倍桩径时,可充分利用土的承载能力并满足计算精度要求。相应P-S曲线的比较证明了本文方法的正确性和合理性。
The finite element software is used to analyze the selection of soil boundary in the pile-soil model when the pile is subjected to load. The process of finite element modeling is introduced in detail. By calculating the ultimate bearing capacity of the pile under different boundary conditions of soil, a reasonable soil boundary for the calculation of pile-soil model is obtained. The results show that when the pile boundary soil is 12 times the pile diameter and the pile boundary depth is 15 times the pile diameter, the bearing capacity of the soil can be fully utilized and the calculation precision is satisfied. The corresponding P-S curve comparison proves the correctness and rationality of this method.