| 高喷插芯组合群桩竖向承载特性的数值分析 |
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| 引用本文： | 任连伟,张华东,郑浩.高喷插芯组合群桩竖向承载特性的数值分析[J].防灾减灾工程学报,2009,29(4):438-443. |
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| 作者姓名： | 任连伟 张华东 郑浩 |
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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、河海大学岩土工程科学研究所,南京,210098
2. 天津市华正岩土工程有限公司,天津,300451 |
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| 摘 要： | 高喷插芯组合桩(简称JPP)是一种新型的复合材料桩,具有承载力高、造价低等优点。利用岩土工程专业软件FLAC3D对JPP群桩竖向承载特性进行了数值模拟分析,讨论了桩数、桩间距、桩长、不同组合形式、不同水泥土弹性模量等对竖向承载特性的影响。结果表明:承载力随着桩数的增加而减小,但16根群桩与25根群桩的承载力相差不多,16根群桩承载力可以代表16根以上群桩的承载力;桩间距越大,承载力越小,桩间距宜采用3倍的JPP组合桩径或4倍的芯桩桩径;承载力随着桩长的增加而增加;分段组合形式承载力效果较好,实际工程施工中宜采用之;水泥土弹性模量对竖向位移没有影响,但水泥土弹性模量越大,芯桩轴力越小。
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| 关 键 词： | 高喷插芯组合群桩 竖向承载特性 数值模拟 承载力 芯桩轴力 |
Numerical Analysis on Vertical Bearing Behavior of JPP Pile Group |
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| REN Lian-wei,ZHANG Hua-dong,ZHENG Hao.Numerical Analysis on Vertical Bearing Behavior of JPP Pile Group[J].Journal of Disaster Prevent and Mitigation Eng,2009,29(4):438-443. |
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| Authors: | REN Lian-wei ZHANG Hua-dong ZHENG Hao |
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| Institution: | REN Lian-wei1,ZHANG Hua-dong2,ZHENG Hao1(1.Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Geotechnical Research Institute,Hohai University,Nanjing 210098,China,2.Tianjin Huazheng Geotechnical Co.,Ltd,Tianjin 300451,China) |
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| Abstract: | Jet grouting soil-cement-pile strengthened pile(JPP) is a new kind of composite pile,and has the advantages of high bearing capacity and low cost.Using the software FLAC3D,the paper mainly focuses on the vertical bearing behavior of JPP pile group.Some influential factors,such as pile number,pile spacing,pile length,combination forms and elastic modulus of soil-cement, are introduced and their effects on vertical bearing behavior are analyzed respectively.Simulation results show that: the bearing capacity i... |
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| Keywords: | JPP pile group vertical bearing behavior numerical simulation bearing capacity axial force of core pile |
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