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考虑荷载传递非线性特性的基桩竖向承载力计算

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Keywords: 桥梁工程,桩基础,荷载传递法,双曲线模型,三折线模型,幂级数

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Abstract:

在现有基桩竖向承载力计算方法基础上,考虑桩侧荷载传递的非线性特征,采用双曲线模型表示桩侧摩阻力。同时,为反映施工中桩端沉渣对承载力的影响,采用三折线模型表示桩端阻力,在此基础上采用幂级数求解方法建立考虑荷载传递非线性特性的基桩竖向承载力计算方法,反映土体分层影响与桩桩土相互作用。工程实例分析表明,对桩侧剪力-位移实测数据采用双曲线函数拟合,效果较好,计算P-s曲线与实测值吻合良好。该方法具有一定的合理性与可行性。

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