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| 软土中已打入桩对土体位移的遮帘作用研究 | |
| 引用本文： | 吴晓峰,王浩,文新伦.软土中已打入桩对土体位移的遮帘作用研究[J].岩土力学,2006,27(12):2208-2212. |
| 作者姓名： | 吴晓峰 王浩 文新伦 |
| 作者单位： | 1. 同济大学,岩土工程重点实验室,上海,200092;同济大学,土木工程学院地下建筑与工程系,上海,200092 2. 上海市政工程设计研究总院地下空间院,上海,200092 3. 上海市基础工程公司,上海,200002 |
| 摘 要： | 采用侧向移动土中桩的理论分析结果以及有限元数值模拟，较为系统地分析了沉桩工程中已打入桩对土体侧向位移及地表隆起的遮帘作用，结果表明已打入桩对土体侧向位移的总体遮帘作用并不显著。采用不同切向劲度系数的接触面单元以模拟已打入桩间隔时间长短对地表隆起的遮帘效应，结果表明：打入桩间隔期较短时，已打入桩对地表隆起的遮拦作用主要体现在对土体位移的“水平阻隔”上，土体沿桩土界面发生流动向上隆起；而间隔期较长时，桩土间存在有较大的摩阻力而限制了土体的位移，此时已打入桩对地表隆起的遮拦作用体现在竖向摩阻力对土体隆起的“抑制”上。 |
| 关 键 词： | 沉桩工程 软土 遮帘作用 地表隆起 侧向位移 |
| 文章编号： | 1000-7598-（2006）12-2208-05 |
| 收稿时间： | 2005-02-05 |
| 修稿时间： | 2005-02-05 |
Analysis of sheltering effects of previously driven piles on soil displacements in soft soils |
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| WU Xiao-feng,WANG Hao,WEN Xin-lun.Analysis of sheltering effects of previously driven piles on soil displacements in soft soils[J].Rock and Soil Mechanics,2006,27(12):2208-2212. | |
| Authors: | WU Xiao-feng WANG Hao WEN Xin-lun |
| Institution: | 1. Key Laboratory of Geotechnical Engineering, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, School of Civil Engineering, Tongji University, Shanghai 200092, China; 3. Vndergrond Space Design Institute, SMEDI, Shanghai 200092, China; 4. Shanghai Foundation Engineering Company, Shanghai 200002, China |
| Abstract: | Using the theoretical analysis results for the piles in soils undergoing lateral movement and the numerical simulation based on the finite element method, the sheltering effect of previously driven piles on the soil displacements in soft soils in pile driving engineering is discussed. The research shows that the sheltering effect of previously driven piles on the total lateral soil displacement is little. Different shear stiffness factors of the interface elements are used to analyze the influence of time interval between later and previously driven piles on the sheltering effect of previously driven piles. The sheltering effect of previously driven piles on ground heave is contributed mainly to the horizontal block to the soil movement and the restraining of soil heave by the large shaft friction for the short and long time interval, respectively. |
| Keywords: | pile driving engineering soft soils sheltering effects ground heave lateral soil displacement |
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