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为探讨钢筋混凝土预制桩和水泥土搅拌桩组合桩(简称组合桩)在水平荷载作用下的受荷特性和承载力,基于组合桩的水平载荷试验结果和土体离散层模型,分析了这种组合桩受水平力作用时的变形、内力和桩周土压力分布。结果表明,钢筋混凝土预制桩芯桩的插入改变了水泥土搅拌桩的传力特点,提高了桩的侧摩阻力和侧向承载力;组合桩具有较好的抗侧向变形的能力,桩体侧向变形主要集中于桩的上部;桩周土体的侧压力上部较大,上部和下部受力方向相反;组合桩桩体的弯矩和剪力主要分布在桩体的上半部;芯桩对桩体的刚度、侧向变形大小起决定作用,而对桩体的弯矩和剪力的分布影响较小。
In order to investigate the load-bearing capacity and bearing capacity of composite precast piles and cement-soil mixed piles (composite piles) under horizontal load, based on the horizontal load test results of composite piles and soil discrete layer model, Deformation, Internal Force and Earth Pressure Distribution of Composite Piles under Horizontal Force. The results show that the insertion of reinforced concrete precast piles changes the force transmission characteristics of the cement-soil mixing piles and increases the lateral friction and lateral bearing capacity of the piles. The composite piles have better resistance to lateral deformation, Lateral deformation is mainly concentrated in the upper part of the pile; lateral pressure of the soil around the pile is larger in the upper part and in the opposite direction in the upper part and lower part; the bending moment and shear force of the composite pile body are mainly distributed in the upper half of the pile body; Piles play a decisive role in the stiffness and lateral deformation of the pile, but have little effect on the bending moment and shear distribution of the pile.