| 缺损桩的导纳谱判别法及应用 |
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| 引用本文： | 邵广周,孟昭秦,刘国华.缺损桩的导纳谱判别法及应用[J].地球科学与环境学报,2006,28(4):73-77. |
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| 作者姓名： | 邵广周 孟昭秦 刘国华 |
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| 作者单位： | 长安大学,地质工程与测绘工程学院,陕西,西安,710054 |
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| 基金项目： | 国家863项目(2005AA615010) |
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| 摘 要： | 利用振动工程中的模态分析技术,对桩基系统的振动特性进行研究。根据桩基系统的集中质量参数振动模型,对完整桩和各种缺损桩模型的导纳谱进行了大量的正演计算,按照导纳谱特征与桩基的缺损类型及缺损位置之间的对应关系,编制了相应的判读软件DSP1.0系统,实现了桩基完整性以及缺损桩缺损位置和缺损性质的计算机自动判读。
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| 关 键 词： | 桩基 导纳谱 振动 模态分析 集中质量 |
| 文章编号： | 1672-6561（2006）04-0073-05 |
| 收稿时间： | 2006-01-14 |
| 修稿时间： | 2006年1月14日 |
Method of Detecting Integrality of Defective Piles in Terms of Characteristic of Mechanical Admittance Spectrum and Its Engineering Application |
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| SHAO Guang-zhou,MENG Zhao-qin,LIU Guo-hua.Method of Detecting Integrality of Defective Piles in Terms of Characteristic of Mechanical Admittance Spectrum and Its Engineering Application[J].Journal of Earth Sciences and Environment,2006,28(4):73-77. |
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| Authors: | SHAO Guang-zhou MENG Zhao-qin LIU Guo-hua |
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| Abstract: | The modal analysis technique in vibration engineering is used to study the vibration characteristic of the pile system.The pile systems are simplified as different vibration systems with different degree of freedom.The mechanical admittance spectrums of the intact pile and all kinds of defective piles are computed largely according to the lumped mass model of the pile system.It is found that the characteristic of mechanical admittance spectrum have some coincidence relations with the style and position of the defective piles.Therefore,the quality of the pile foundation can be detected in terms of this characteristic.This principle is applied to actual engineering,and the actual data is processed with proper data processing and spectrum analysis methods,the corresponding processing software is also developed along with them.The result of actual measurement proves that the method is viable to a certain degree if the model is selected expediently,and the interpretation software has some useful value too. |
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| Keywords: | pile admittance spectrum vibration modal analysis lumped mass |
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