含有缺陷桩的桩基础竖向承载性状的三维有限元分析

Three-dimensional finite element analyses of the behavior of pile foundation with defective piles under vertical loadings

采用三维非线性有限元法研究了含有缺陷桩的桩基础的竖向承载性状,并与相应的无缺陷桩的桩基础的承载性状进行了对比分析,指出了在竖向荷载作用下,缺陷桩可不进行加固处理或仅需简单加固处理的一些缺陷情况。研究成果揭示了缺陷桩对桩基础整体工作特性影响规律性,对出现缺陷桩时的桩基承载性状的分析评价与施工技术处理有重要的指导意义。

Analyses the load - bearing behavior of pile foundation with defective piles under vertical loadings with the method of finite element, and through comparing with the relevant result of pile foundation without defective piles, we can conclude that under the vertically loadings, some defect of the pile that the defective piles need not be reinforced or just need be simply reinforced. The research reveals the regularity of the effect that the defective piles contribute to the whole load-bearing characteristic of the pile foundation, it contains important guiding significance to analyze and estimate the characteristic of load-bearing of the whole pile foundation and the construction technique to deal with it when the defective piles are detected.