| 微型桩抗拔承载特性的数值模拟分析 |
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| 引用本文： | 黄俊,周峰,王旭东.微型桩抗拔承载特性的数值模拟分析[J].南京工业大学学报(自然科学版),2011,33(5):75-78,83. |
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| 作者姓名： | 黄俊 周峰 王旭东 |
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| 作者单位： | 南京工业大学岩土工程研究所,江苏,南京,210009 |
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| 基金项目： | 江苏省“六大人才高峰”计划资助项目(09-F-004) |
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| 摘 要： | 开展微型桩抗拔承载特性的现场载荷试验,通过建立微型桩三维有限元数值分析模型。在利用现场载荷试验资料反演有限元计算参数和验证有限元模型合理性基础上,探讨桩长、桩径、二次注浆和水平荷载等因素对微型桩抗拔性能的影响规律。结果表明:三维有限元模型适于微型桩的抗拔承载特性分析,接触系数Ri为合理模拟不同注浆施工工况提供了有效途径,数值模拟得到的相关结论对优化抗拔微型桩设计有积极的指导作用。
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| 关 键 词： | 微型桩 现场载荷试验 数值模拟 抗拔承载特性 |
Numerical simulation analysis of uplift bearing characteristics of micropiles |
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| HUANG Jun,ZHOU Feng,WANG Xudong.Numerical simulation analysis of uplift bearing characteristics of micropiles[J].Journal of Nanjing University of Technology,2011,33(5):75-78,83. |
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| Authors: | HUANG Jun ZHOU Feng WANG Xudong |
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| Institution: | (Institute of Geotechnical Engineering,Nanjing University of Technology,Nanjing 210009,China) |
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| Abstract: | A field load test about uplift bearing characteristics of micropiles was performed and its three-dimensional finite element numerical analysis model was established.By conducting numerical analysis from the load test results of micropiles,the rationality of the finite element model and parameters were validated by field load test results.Numerical simulation was used to discuss the influence of pile diameter,pile length,second grouting and horizontal load on uplift characteristics of micropiles.Results indicated that three-dimensional finite element model was suitable to analyze uplift bearing characteristics of micropiles.An effective way was provided to simulation different grouting conditions by using contact coefficient Ri.The related conclusions had a guidance function in design of micropiles under the uplift load. |
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| Keywords: | micropile field load test numerical simulation uplift bearing characteristics |
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