| 基于荷载传递法的嵌岩桩负摩阻力计算研究 |
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| 引用本文： | 贺成斌,赵明华,雷勇.基于荷载传递法的嵌岩桩负摩阻力计算研究[J].工程力学,2014,31(11):110-115. |
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| 作者姓名： | 贺成斌 赵明华 雷勇 |
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| 作者单位： | 1.湖南大学岩土工程研究所,湖南,长沙 410082; |
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| 基金项目： | 国家自然科学基金项目(51208195);湖南省教育厅项目(10C0669) |
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| 摘 要： | 结合有效应力法及荷载传递法建立了嵌岩桩负摩阻力计算的分段模型。通过位移控制方程计算得到了桩身不同段位移及轴力的解析解及幂级数解,进一步得到了计算桩身轴力及负摩阻力中性点位置的迭代计算方法。在一工程实例分析时,采用线性拟合的方法准确拟合桩周土体沉降,所得的桩身轴力沿桩长范围内的变化曲线与实测曲线较为吻合,该法能较准确地描述桩身负摩阻力的传递过程及其沿桩身的分布。
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| 关 键 词： | 嵌岩桩 负摩阻力 有效应力 荷载传递法 幂级数解 |
| 收稿时间： | 2013-05-16 |
NEGATIVE FRICTION COMPUTATIONAL RESEARCH OF ROCK-SOCKETED PILE BASED ON LOAD TRANSFER METHOD |
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| Affiliation: | 1.Geotechnical Engineering Institute, Hunan University, Changsha 410082, China;2.College of Civil Engineering, Hunan University of Science and Technology, Xiangtan, Hunan 411201, China |
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| Abstract: | The negative friction piecewise calculation model of a rock-socketed pile was established by the effective stress method, combining with the load transfer method. Then the analytical solution and the power series solution of pile body displacements and axial forces were obtained by a displacement control equation. Furthermore, the iterative calculation method used to calculate the pile shaft axial forces and the neutral position of negative skin friction resistance was proposed. Through the analysis of an engineering example and using linear fitting method to accurately describe the soil subsidence, the change curve of pile axial-forces along the pile within the scope is identical with a measured curve. The method can accurately describe the negative friction transmission process and its distribution along a pile. |
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