| 冲击作用下地基内部动应力研究——强夯冲击的动应力研究之二 |
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| 引用本文： | 邓通发,罗嗣海,李辉,赖昕云.冲击作用下地基内部动应力研究——强夯冲击的动应力研究之二[J].四川建筑科学研究,2013(6):117-121. |
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| 作者姓名： | 邓通发 罗嗣海 李辉 赖昕云 |
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| 作者单位： | [1]江西理工大学建筑与测绘工程学院,江西赣州341000 [2]广州大学土木工程学院,广东广州510006 |
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| 基金项目： | 国家自然科学基金资助项目（50869002）;江西省自然科学基金项目（2008GZC0031）;内蒙古自治区交通厅科技项目（NJ-2013-19） |
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| 摘 要： | 强夯时锤-土接触面和地基内的应力受到众多因素影响,精确求解较为困难,可行的途径是采用近似和简化方法来估算。本文在系统总结既有地基内冲击应力计算公式的基础上,对冲击时地基内部动应力的数值分析和实测结果进行了拟合,并对理论公式进行了比较。结果表明,强夯冲击动应力沿深度的衰减略快于静载下的应力分布,且不同方法得到的值差别较大。
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| 关 键 词： | 强夯 锤-土接触应力 冲击动应力 分布 比较 |
Study on soil vertical impact dynamic stress in dynamic compaction |
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| DENG Tongfa,LUO Sihai,LI HuiI,LAI Xinyun.Study on soil vertical impact dynamic stress in dynamic compaction[J].Building Science Research of Sichuan,2013(6):117-121. |
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| Authors: | DENG Tongfa LUO Sihai LI HuiI LAI Xinyun |
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| Affiliation: | 1. School of Architectural and Surveying and Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China; 2. School of Civil Engineering,Guangzhou University,Guangzhou 510006,China) |
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| Abstract: | Due to the influence of many factors,it is difficult to exactly solve the contact stress of hammer-soil and soil vertical impact dynamic stress, while the feasible method is simplification and approximation. On the basis of systematic summary of the existing calculation formulas for the solutions of soil vertical impact dynamic stress, the numerical analysis results and experimental results of foundation internal impact dynamic stress were fitted, and compared with those obtained by the theoretical formulas. The results show that the calculating results have the large difference between the calculating methods, the distribution of soil vertical impact dynamic stress distribution is damping slightly faster under common conditions than that under conditions of static load. |
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| Keywords: | dynamic compaction contact stress of hammer-soil impact dynamic stress distribution comparison |
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