| 桩端桩侧后注浆灌注桩竖向承载性能有限元分析 |
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| 引用本文： | 郑爱荣,肖大平,诸葛爱军,陈举.桩端桩侧后注浆灌注桩竖向承载性能有限元分析[J].中国港湾建设,2011(1):27-31. |
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| 作者姓名： | 郑爱荣 肖大平 诸葛爱军 陈举 |
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| 作者单位： | 1. 中交天津港湾工程研究院有限公司,港口岩土工程技术交通行业重点实验室,天津市港口岩土工程技术重点实验室,天津,300222
2. 中国建筑科学研究院,北京,100013 |
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| 摘 要： | 在现场试桩试验的基础上,考虑土体的小应变刚度,应用Plaxis程序中的小应变硬化土模型,对桩端桩侧联合后注浆灌注桩的竖向承载性能进行有限元分析。研究表明：有限元分析桩土作用时,应充分考虑土体的小应变刚度;灌注桩注浆后,桩土界面条件改善,桩侧摩阻力提高明显,相对位移减小;沉渣固化和桩端持力层强度的提高,使得桩端阻力明显增大并且发挥提前,可以在较小的桩端位移下发挥较大的桩端阻力,减少了桩体沉降量,提高了承载力,改善了灌注桩的承载性能。
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| 关 键 词： | 灌注桩 后注浆 承载性能 有限元分析 小应变硬化土模型 |
Finite Element Analysis on Vertical Bearing Capacity of Bored Pile with Pile-toe, Pile-shaft and Post-grouting |
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| ZHENG Ai-rong,XIAO Da-ping,ZHUGE Ai-jun,CHEN Ju.Finite Element Analysis on Vertical Bearing Capacity of Bored Pile with Pile-toe, Pile-shaft and Post-grouting[J].China Harbour Engineering,2011(1):27-31. |
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| Authors: | ZHENG Ai-rong XIAO Da-ping ZHUGE Ai-jun CHEN Ju |
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| Institution: | ZHENG Ai-rong1,XIAO Da-ping2,ZHUGE Ai-jun1,CHEN Ju1(1.CCCC Tianjin Port Engineering Institute Co.,Ltd.,Key Laboratory of Geotechnical Engineering of Ministry of Communications,Key Laboratory of Geotechnical Engineering of Tianjin,Tianjin 300222,China,2.China Academy of Building Research,Beijing 100013,China) |
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| Abstract: | Based on static load test results,with consideration of the small-strain stiffness characteristic of soils the bearing capacity of bored piles with pile-toe and pile-shaft post-grouting have been analyzed using HS-small model of Plaxis program.The analyses reveal that the small-strain stiffness of soil is not negligible in analyzing pile and soil interaction;with post-grouting,the interface between pile and surrounding soil were strengthened and the relative sliding displacement in between was reduced,end r... |
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| Keywords: | bored pile post-grouting bearing capacity finite element analysis HS-small model |
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