| 高能强夯下地基土体的变形特性 |
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| 引用本文： | 王 威,王建华.高能强夯下地基土体的变形特性[J].岩土力学,2015,36(Z1):315-319. |
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| 作者姓名： | 王 威 王建华 |
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| 作者单位： | 上海交通大学 船舶海洋与建筑工程学院，上海 200240 |
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| 基金项目： | 国家自然科学基金（No.41372282，No.41330633）。 |
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| 摘 要： | 为了掌握高能级强夯作用下土体的变形特性，在LS-DYNA的框架内，采用非线性大变形显示有限元算法和“帽子”本构模型，计算了强夯作用下地基土体的变形。首先，根据现场施工的实际情况建立了有限元基本模型，并与实际的监测数据进行比较，其计算结果与测试结果基本一致，该模型能较好地反映出土体的隆起和侧向位移特点。其次，以该基本模型和夯坑的变形为考察对象进行参数分析，研究了不同能级、同能级不同动量以及夯锤与地基土间的水平摩擦力对土体变形的影响。结果表明，高能级强夯作用下夯锤与地基土间的水平力是不可忽略；夯锤与地基土之间的摩擦力，对夯坑侧向的土体位移和地表的隆起有明显的影响
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| 关 键 词： | 高能强夯 帽子模型 土体变形 动力接触 |
| 收稿时间： | 2015-03-05 |
Numerical modeling of ground settlement under high energy dynamic compaction |
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| WANG Wei,WANG Jian-hua.Numerical modeling of ground settlement under high energy dynamic compaction[J].Rock and Soil Mechanics,2015,36(Z1):315-319. |
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| Authors: | WANG Wei WANG Jian-hua |
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| Institution: | School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, Shanghai 200240, China |
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| Abstract: | In order to acquire the characteristics of ground settlement under the high energy dynamic compaction, the geometric nonlinear finite element method and the cap model in LS-DYNA finite element program are used to analyze the deformation mechanism of dynamic compaction. Firstly, according to the actual situation of site construction to establish the finite element model as basic computing model to model the process of dynamic compaction, and comparing with the actual monitoring data, the results indicate that the calculated results acquired in the analysis are close to the actual data measured in dynamic compaction; and the basic model used to calculate the settlement of surface ground is appropriate. Furthermore, the different energy level, different momentum, and some friction parameters effect on the settlement of surface ground are analyzed based on the basic model. Lastly, some useful conclusions are drawn. The results show that the horizontal force between hammer and the foundation soil is not to be ignored under the high energy dynamic compaction. |
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| Keywords: | high energy dynamic compaction cap model soil deformation dynamic contact |
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