| 桩端条件对灌注桩荷载传递特性的影响 |
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| 引用本文： | 袁振,陈锦剑,王建华.桩端条件对灌注桩荷载传递特性的影响[J].岩土力学,2006,27(8):1398-1402. |
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| 作者姓名： | 袁振 陈锦剑 王建华 |
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| 作者单位： | 上海交通大学,土木工程系,上海,200030 |
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| 摘 要： | 以荷载传递法为基础，研究了桩端条件对灌注桩荷载传递特性的影响。采用考虑桩侧软化的三阶段荷载传递函数，并以三折线模型模拟桩端土劣化或沉渣的影响，通过静力平衡条件建立微分控制方程。以桩端沉降和端阻力为边界条件，并将桩侧双曲线段的非线性两阶常微分方程转化为积分方程，并用数值方法求解，可以得到桩身任意截面的沉降、轴力和侧摩阻力。通过参数分析，研究了不同桩端刚度和不同沉渣厚度下灌注桩的荷载一沉降曲线和桩侧摩阻力的分布情况，讨论桩端条件对单桩荷载传递特性的影响。对两组相邻试桩的工程实例进行分析计算，结果表明，该方法能较好地反映实际情况。
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| 关 键 词： | 荷载传递 桩端条件 应变软化 桩端刚度 沉渣 |
| 文章编号： | 1000-7598-（2006）08-1398-05 |
| 收稿时间： | 2004-09-10 |
| 修稿时间： | 2004-09-102004-12-28 |
Influence of end conditions on load transfer behavior of cast-in-place piles |
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| YUAN Zhen,CHEN Jin-jian,WANG Jian-hua.Influence of end conditions on load transfer behavior of cast-in-place piles[J].Rock and Soil Mechanics,2006,27(8):1398-1402. |
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| Authors: | YUAN Zhen CHEN Jin-jian WANG Jian-hua |
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| Institution: | Department of Civil Engineering, Shanghai Jiaotong University, Shanghai 200030, China |
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| Abstract: | The influence of end conditions on the load transfer behavior of cast-in-place pile is discussed using the load transfer method. The three-stage hyperbolic softening model is present as the load transfer function of pile-side, and tri-linear model is introduced to simulate the characteristics of sediments in pile end. Differential equations are established by dealing with the states of static equilibrium, with the settlements and resistant forces of pile-end as boundary conditions. By transforming the nonlinear differential equations into integral equetions and solving them numerically; variation of the axial force along depth and the load-settlement curve of pile are obtained. The load-settlement curves and distribution of friction on pile-side of pile under different pile-end stiffnesses and thicknesses of sediments are studied by parameter analysis. Analysis of two groups of adjacent test piles shows that this method can well represent the actual character of pile foundations. |
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| Keywords: | load transfer end conditions strain softening pile-end stiffness sediment |
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