| 现浇X形混凝土桩竖向承载特性试验及其极限承载力预测 |
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| 引用本文： | 张敏霞,丁选明,陈育民. 现浇X形混凝土桩竖向承载特性试验及其极限承载力预测[J]. 煤炭学报, 2011, 36(2): 267-271 |
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| 作者姓名： | 张敏霞 丁选明 陈育民 |
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| 作者单位： | 1河海大学 岩土力学与堤坝工程教育部重点实验室，江苏 南京210098;2河南理工大学 土木工程学院，河南 焦作454000;3河海大学 岩土工程科学研究所，江苏 南京210098 |
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| 基金项目： | 江苏省自然科学基金创新学者攀登项目(BK2008040）;江苏省青蓝工程创新团队资助项目 |
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| 摘 要： | 通过开展大型模型槽足尺模型试验，根据荷载沉降特性和桩身轴力的试验结果，分析了竖向荷载作用下现浇X形混凝土桩的承载特性和桩－土共同作用性状。采用Boltzmann数学模型X形桩荷载－沉降曲线进行拟合，结果表明:用Boltzmann数学模型拟合试验各桩的荷载－沉降曲线效果较好，相关系数均达到了0.999 以上;基于该模型的X形桩极限承载力计算值与实测值的误差小于1%。
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| 关 键 词： | 现浇X形混凝土桩 极限承载力 足尺模型试验 Q-S曲线 Boltzmann模型, |
| 收稿时间： | 2010-07-08 |
Test on vertical behavior of cast-in-situ X-shaped concrete pile and its ultimate bearing capacity prediction |
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| Abstract: | The behavior of cast-in-situ X-shaped concrete pile (X shaped pile) under vertical load and pile soil interaction characteristics were analyzed according to the pile load settlement characteristics and axial force of a full scale model test.Boltzmann mathematical model was used to fit the load settlement curve of X-shaped pile,and experimental results agree well.Fitting results show that Boltzmann model can be used to model the bearing behavior of X-shaped piles,with the correlativity coefficient being over 0.999,and the error percent between X-shaped pile ultimate bearing capacity calculation value and testing value is less than 1%. |
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| Keywords: | cast-in-situ X-shaped concrete pile ultimate bearing capacity full scale model test Q-S curve Boltzmann model |
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