| 强夯作用下接触应力与土体竖向位移计算 |
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| 引用本文： | 刘汉龙,高有斌,曹建建,徐士龙.强夯作用下接触应力与土体竖向位移计算[J].岩土工程学报,2009,31(10):1493-1497. |
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| 作者姓名： | 刘汉龙 高有斌 曹建建 徐士龙 |
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| 作者单位： | 河海大学岩土力学与堤坝工程教育部重点实验室;河海大学岩土工程科学研究所;浙江广川工程咨询有限公司;上海港湾软地基处理工程有限公司 |
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| 基金项目： | 国家自然科学基金重点项目(50639010);;江苏省青蓝工程创新团队项目;;浙江省重大科技专项优先主题项目 |
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| 摘 要： | 针对钱家欢加卸载弹性模型中强夯冲击应力在加荷阶段应力偏大,卸荷阶段应力函数形式复杂的不足,对应力峰值进行修正和对应力函数进行改进,即将复杂的分段函数形式转化为标准的正弦函数形式。而且,根据动力分析中应力边界与速度边界之间的关系,将应力边界时程转化为速度边界时程,并将正弦荷载函数引入,推导出一种计算土体竖向位移的简化计算方法。工程实例表明,该法形式简单、使用方便,计算结果很接近实测位移。更多还原
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| 关 键 词： | 强夯法 地基处理 动应力 竖向位移 |
Calculation of contact stress and soil vertical displacement under dynamic compaction |
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| LIU Han-long,GAO You-bin,CAO Jian-jian,XU Shi-long.Calculation of contact stress and soil vertical displacement under dynamic compaction[J].Chinese Journal of Geotechnical Engineering,2009,31(10):1493-1497. |
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| Authors: | LIU Han-long GAO You-bin CAO Jian-jian XU Shi-long |
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| Affiliation: | 1. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China; 2. Geotechnical Research Institute,Hohai University,Nanjing 210098,China; 3. Zhejiang Guangchuan Engineering Consulting Co.,Ltd.,Hangzhou 310020,China;4.Shanghai Harbor Soft Soil Treatment Engineering Co.,Ltd.,Shanghai 200092,China |
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| Abstract: | In Qian Jiahuan's load-unload elastic model of dynamic compaction,according to the disadvantages that the impact stress is large at the loading stage and the stress style is complicated at the unloading stage comparatively,the complicated piecewise function is improved into standard sine function. And,on the basis of the relationship between stress boundary time-history and speed boundary time-history in dynamic analysis,the stress time-history of dynamic boundary condition is transformed into the speed time-history and the sine load function is introduced. A new simplified method under the sine load is derived,and it can calculate vertical displacement well. Engineering practices show that the method is simple and easy to use,and the calculated results are very close to the measured displacements |
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| Keywords: | dynamic compaction foundation treatment dynamic stress vertical displacement |
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