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| 特大型组合式高应变动力试桩重锤 | |
| 引用本文： | 李廷,何继善,徐振华,钱韬.特大型组合式高应变动力试桩重锤[J].中南大学学报(自然科学版),2008,39(5). |
| 作者姓名： | 李廷 何继善 徐振华 钱韬 |
| 作者单位： | 1. 中南大学,信息物理工程学院,湖南,长沙,410083;广东省建筑科学研究院,广东,广州,510500 2. 中南大学,信息物理工程学院,湖南,长沙,410083 3. 广州仲恺农业技术学院,城市建设学院,广东,广州,510500 4. 东京大学,物理学部,日本,东京,3710073 |
| 摘 要： | 提出组合式重锤的概念,建立锤体受力模型及重锤-桩-岩土冲击响应问题的正演分析模型与算法;研究组合式重锤的适用性和安全性,以及高应变动力试桩中各桩土参数与试验结果影响关系.研究结果表明:锤体冲击过程中基本不受拉力,符合试验要求;特大型组合式基桩高应变动力试桩重锤应用于灌注桩承载力检测是可行的;锤重、落距、桩径、桩长、土阻力分布、桩侧及桩端土弹限、锤垫刚度和力脉冲宽度等因素对检测承载力均有较大影响. |
| 关 键 词： | 组合式重锤 重锤与桩和岩土的匹配 灌注桩 高应变 |
Special large-scaled and knockdown hammer in high strain dynamic pile test |
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| LI Ting,HE Ji-shan,XU Zhen-hua,QIAN Tao.Special large-scaled and knockdown hammer in high strain dynamic pile test[J].Journal of Central South University:Science and Technology,2008,39(5). | |
| Authors: | LI Ting HE Ji-shan XU Zhen-hua QIAN Tao |
| Institution: | LI Ting1,2,HE Ji-shan1,XU Zhen-hua3,QIAN Tao4(1.School of Information , Physics Engineering,Central South University,Changsha 410083,China,2.Cuangdong Provincial Academy of Architecture Science,Guangzhou 510500,3.School of City Building,Guangzhou Zhongkai Agricultural Technology College,4.School of Physics,Tokyo University,Tokyo 3710073,Japan) |
| Abstract: | Dynamic load testing requires enough impact energy to activate the specified test load or ultimate capacity.For drilling piles,the concept of knockdown hammer was presented,and the hammer force model and the hammer-pile-soil impulse response model with its arithmetic were described.The research of the utility and safety of the hammer was performed.The affecting factors of pile-soil system to the results of dynamic load testing were also analyzed.The results show that there is no tensile force in hammer duri... |
| Keywords: | knockdown hammer matching between hammer and pile-soil system filling pile high strain dynamic test |
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