| 强夯加固回填土地基振动特性的三维数值模拟 |
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| 引用本文： | 陈超,徐长节,蔡袁强. 强夯加固回填土地基振动特性的三维数值模拟[J]. 哈尔滨工业大学学报, 2009, 0(12): 119-122 |
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| 作者姓名： | 陈超 徐长节 蔡袁强 |
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| 作者单位： | 浙江大学岩土工程研究所 |
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| 基金项目： | 浙江省建设厅资助项目(200106) |
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| 摘 要： | 基于ABAQUS有限元软件,采用大变形几何非线性三维有限元方法对回填土地基强夯施工引起的振动特性进行了研究.在有限元分析中,提出了强夯塑性加固区的判断标准,考虑每次夯击后回填土体塑性区的开展范围并对加固区内的土性参数进行调整,以此实现对强夯多次夯击过程的模拟.在此基础上分析了土体振动加速度、速度的特性及其变化规律,以及夯击能量对于土体振动特性的影响.在研究振动加速度峰值和速度峰值的衰减特征的基础上,得到了回填土地基强夯振动的影响范围.计算结果与实测数据吻合较好,验证了研究方法的可靠性.研究方法和结论对类似的强夯工程有一定的参考价值.
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| 关 键 词： | 强夯 有限元 回填土 振动 衰减 ABAQUS |
Three-dimensional numerical simulation on vibration characteristic of backfilled soil caused by dynamic compaction |
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| CHEN Chao,XU Chang-jie,CAI Yuan-qiang. Three-dimensional numerical simulation on vibration characteristic of backfilled soil caused by dynamic compaction[J]. Journal of Harbin Institute of Technology, 2009, 0(12): 119-122 |
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| Authors: | CHEN Chao XU Chang-jie CAI Yuan-qiang |
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| Affiliation: | (Geotechnical Engineering Institute,Zhejiang University,Hangzhou 310027,China) |
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| Abstract: | The vibration characteristic caused by dynamic compaction is studied by ABAUQS using geometrically nonlinear three-dimensional finite element method for the coarse-grained backfilled soils.The criterion for determining the plastic reinforced zone is presented.In the numerical simulation and analysis,the shape of the plastic reinforced zone is identified and the parameters of soils are adjusted after each drop.The influence of impact energy on the velocity and acceleration is also studied.Base on the results of numerical simulation,the limit of influence of vibration is gotten,which matches well with that obtained in the in-site test.The conclusions in this paper can provide valuable references for practical engineering. |
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| Keywords: | dynamic compaction FEM backfilled soil vibration attenuation ABAQUS |
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