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由于“m”法计算桩基时未考虑桩侧土摩阻力,为研究桩侧土摩阻力对长短组合桩基础桩基轴力分布的影响,以港珠澳大桥浅水区非通航孔桥桩基础为例开展分析,采用Midas有限元软件建立模型进行计算分析,模型中采用多折线弹簧模拟桩侧土摩阻力。结果表明,桩侧土摩阻力对长短组合桩基础桩基轴力影响较大,计算方法对桩基设计及工程造价控制具有重要意义。
In order to study the influence of friction on the pile foundation on the axial force distribution of pile foundation with short and long pile foundation, the non-navigable bridge in shallow area of Hong Kong-Zhuhai-Macau Bridge Pile foundation as an example to carry on the analysis, uses the Midas finite element software to establish the model to carry on the computation to the analysis, in the model uses the multi-line spring to simulate the side soil frictional resistance. The results show that the friction on pile side has a great influence on the axial force of pile foundation with long and short combined pile foundation. The calculation method is of great significance to the design of pile foundation and project cost control.