【摘要】 结合大体积深水群桩基础在潮汐水文条件影响下群桩桩顶轴力沿平面分布的特性,研究了用来预测桩顶轴力沿平面分布的混合模型一般原理,提出了基于实测数据的混合模型。在某大桥群桩基础的工程实例中,结合了FLAC3D有限差分软件与PSO-SVM方法实现了混合模型的构建。并且将混合模型与RBF模型的预测结果进行了对比。研究表明,混合模型能较精准地刻画大体积群桩基础在运营期间桩顶轴力的分布规律,具有一定的工程应用价值。更多还原

【Abstract】 Combined with the characteristics of the axial force distribution along the plane of pile cap under the influence of tidal and hydrological conditions, the general principle of the hybrid model used to predict the axial force distribution along the plane of pile cap is studied, and a hybrid model based on the measured data is proposed. In an engineering example of pile group foundation of a bridge, a hybrid model is constructed by combining FLAC3 D finite difference software and PSO-SVM method. The results of hybrid model and RBF model are compared. The reaserch show that the mixed model can accurately depict the distribution law of the axial force on the top of piles during the operation of large-volume pile group foundation, which has certain engineering application value.更多还原