| 基于模型试验的静压群桩引起的土体变形分析 |
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| 引用本文： | 张建新,鹿群,吴东云,孙世光.基于模型试验的静压群桩引起的土体变形分析[J].岩土力学,2010,31(4):1243-1246. |
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| 作者姓名： | 张建新 鹿群 吴东云 孙世光 |
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| 作者单位： | 天津城市建设学院,天津市软土特性与工程环境重点实验室,天津,300384 |
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| 基金项目： | 国家自然科学基金，天津市自然科学基金，天津市高等学校科技发展基金计划项目 |
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| 摘 要： | 以往对沉桩挤土效应的研究主要集中于单桩或双桩，对群桩挤土效应分析较少。基于室内模型试验，分析了群桩压入软土后土体的变形情况，得到了沉桩过程中及压桩后土体侧向位移、竖向变形和土层表面隆起变化的规律。认识到单桩侧向挤土位移随着距桩边距离的增加而以近似对数规律衰减，群桩压入后土体水平侧移和地表隆起是不断累积的，存在着已压入桩的遮帘作用，而且桩施工顺序对土体位移起到了关键作用，应该在实际工程中得到重视。
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| 关 键 词： | 群桩 土体变形 模型试验 |
| 收稿时间： | 2008-06-10 |
Analysis of soil deformation in jacked pile group based on the model test |
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| ZHANG Jian-xin,LU qun,WU Dong-yun,SUN Shi-guang.Analysis of soil deformation in jacked pile group based on the model test[J].Rock and Soil Mechanics,2010,31(4):1243-1246. |
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| Authors: | ZHANG Jian-xin LU qun WU Dong-yun SUN Shi-guang |
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| Institution: | Tianjin Key Laboratory of Soft Soil Characteristics and Engineering Environment, Tianjin Institute of Urban Construction, Tianjin 300384, China |
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| Abstract: | In the past the study of squeezing effect during pile driving focused on the single or double pile，but little on the pile group. Based on the model test, soil deformations were analyzed when the pile group were driven; then the soil lateral displacement, vertical deformation and the law of soil surface heave were obtained. It is concluded that as the distance to the pile edge increasing, the soil compaction displacement of the side surface of pile is logarithmicly decaying; the soil horizontal displacement and land surface heave are accumulated continuously; but there are sheltering effects after pressing pile, constructing order of pile plays a key role in the soil displacement; so it should be recognized in actual projects. |
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| Keywords: | pile group soil deformation model test |
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