| 现浇X型混凝土桩的荷载传递机理初探 |
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| 引用本文： | 刘汉龙,雍君,丁选明,陈育民. 现浇X型混凝土桩的荷载传递机理初探[J]. 防灾减灾工程学报, 2009, 29(3) |
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| 作者姓名： | 刘汉龙 雍君 丁选明 陈育民 |
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| 作者单位： | 河海大学岩土力学与堤坝工程教育部重点实验室,南京210098;河海大学岩土工程科学研究所,南京210098;河海大学工程力学系,南京,210098;河海大学水资源高效利用与工程安全国家工程研究中心,南京,210098 |
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| 基金项目： | 江苏省333高层次人才培养工程项目 |
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| 摘 要： | 现浇X型混凝土桩技术是河海大学开发研制的用于地基加固处理的一项新技术。在模型试验的基础上,通过有限元方法研究了现浇X型混凝土桩的荷载传递机理,并与模型槽试验结果进行了对比,分析中考虑了桩和土之间的接触和土的非线性。通过数值分析,揭示了X型桩的截面形式对侧摩阻力分布、端阻力发挥的影响。计算结果表明,由于桩的泊松比效应,X型桩截面周边不同位置的侧阻力大小有所不同;X型桩中出现了类似于H型桩的"半封闭土塞",与圆截面桩相比,桩端附近的侧摩阻力有较明显的增加;X型桩的桩端承载力系数要小于圆截面桩的情况,体现了X型桩截面形状的影响。
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| 关 键 词： | 现浇X型混凝土桩 侧阻力 端阻力 |
Study on Load Transfer Mechanism of Cast-in-Place X-Shaped Piles |
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| LIU Han-long,YONG Jun,DING Xuan-ming,CHEN Yu-min. Study on Load Transfer Mechanism of Cast-in-Place X-Shaped Piles[J]. Journal of Disaster Prevention and Mitigation Engineering, 2009, 29(3) |
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| Authors: | LIU Han-long YONG Jun DING Xuan-ming CHEN Yu-min |
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| Affiliation: | LIU Han-long1,2,YONG Jun3,DING Xuan-ming4,CHEN Yu-min1,2(1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China,2.Geotechnical Research Institute,3.Department of Engineering Mechanics,4.National Engineering Research Center of Water Resources Efficient Utilization and Engineering Safety,China) |
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| Abstract: | The technology of cast-in-place X-shaped piles is an innovation developed by Hohai University for strengthening soils.Based on the full scale test,the load transfer mechanism of the X-shaped pile was studied by 3D nonlinear finite element analyses.In the analyses the interface elements were used to represent slippage and separation between the soil and the pile.The numerical results were compared with the results of the chamber tests.The difference of bearing behavior between an X-shaped pile and a round pi... |
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| Keywords: | cast-in-place X-shaped pile shaft resistance end resistance |
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