| 沉桩挤土作用的有限元分析 |
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| 引用本文： | 施建勇,彭劼.沉桩挤土作用的有限元分析[J].东南大学学报(自然科学版),2002,32(1):109-114. |
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| 作者姓名： | 施建勇 彭劼 |
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| 作者单位： | 河海大学岩土工程研究所,南京,210098 |
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| 基金项目： | 教育部优秀青年教师教学和科研奖励计划资助项目 . |
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| 摘 要： | 进行了沉桩挤土效应的有限元计算，考虑到桩周土体由于桩桩贯入引起的挤土效应，选和了修正剑桥模型作为土体本构模型，通过相应的试验，拟合出挤土作用对土作用土体初始弹性模量影响的计算公式，确定了土体本构模型和其他相关的计算分析参数，对2个试验进行了分析计算，结果表明，考虑土体的塑性性质和桩体贯入过程的挤土效应对分析桩周土体的应力和变形是必要的。
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| 关 键 词： | 修正剑桥模型 沉桩 挤土作用 有限元法 土体分析 土体本构模型 |
| 文章编号： | 1001-0505(2002)01-0109-06 |
Finite element method for compaction effect of soil on jacked pile |
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| Shi Jianyong,Peng Jie.Finite element method for compaction effect of soil on jacked pile[J].Journal of Southeast University(Natural Science Edition),2002,32(1):109-114. |
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| Authors: | Shi Jianyong Peng Jie |
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| Abstract: | Compaction effect from jacked pile is calculated by finite element method. Compaction effect of soil surrounding pile is taken into account. Modified cam clay model is adopted as constitutive model of soil. A formula of initial tangent modulus of soil with compaction effect is presented. And the model parameters and other calculation parameters are determined by test. Finite element method is applied to calculation for a centrifuge model test and another model test. Computed results show that for analysis of stress and displacement in soil around pile, it is necessary to take plastic characteristics of soil and compaction effect into account. |
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| Keywords: | modified Cam Clay model jacked pile compaction effect finite element method |
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