采用大型有限元软件ABAQUS,针对大直径超长群桩的有效桩长进行三维有限元数值分析. 采用极限承载力控制法,对竖向荷载下不同布桩形式的大直径超长群桩基础的有效桩长进行研究. 结果表明:有效桩长随桩数的增多而增大,随桩距的增大而减小;桩数增多,有效桩长对应的群桩的极限承载力降低,桩距的变化对有效桩长对应的群桩的极限承载力影响不大.
Based on the framework of FEM software ABAUQS, the three-dimensional numerical analysis for effective length of super-long and large-diameter pile groups is provided. For the pile groups of different arrangements under vertical loading, the effective pile-length was analyzed with the method of bearing capacity control. The results show that the effective pile-length increases with pile number while decreases with the space between piles. The corresponding bearing capacity decreases with pile number while the space between piles has little effect on the corresponding bearing capacity.
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