| 基于小波变换的侧面激振法对在役基桩检测 |
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| 引用本文： | 张敬一,陈龙珠,高飞.基于小波变换的侧面激振法对在役基桩检测[J].桂林工学院学报,2012,32(3):430-434. |
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| 作者姓名： | 张敬一 陈龙珠 高飞 |
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| 作者单位： | 1. 上海交通大学船舶海洋与建筑工程学院安全与防灾工程研究所,上海,200240
2. 上海中九工程检测有限公司,上海200437;中国船舶工业第九设计研究院,上海200063 |
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| 基金项目： | 基金项目：国家自然科学基金项目（51178267）;西部交通科技项目（20113182231390） |
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| 摘 要： | 通过建立桩-土-柱-梁三维有限元模型,分别对柱侧进行横向、斜向下45°、竖向激振,对模拟信号小波变换后,研究了不同的激振形式、激振-检波配置方式对识别桩底深度的影响.结果表明:在激振侧面检波,信号干扰最小;检波器宜在激振高度附近,且激振点应远离上部结构,以减小上部结构的干扰;相对于横向激振,竖向激振与斜向激振时桩底反射更明显,在实际检测中以采用斜向激振为宜.
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| 关 键 词： | 反射波法 小波变换 桩基检测 三维有限元 |
Pile-Side Excitation Integrity Testing for Existing Foundation Based on Wavelet Transform |
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| ZHANG Jing-yi
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CHEN Long-zhu
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GAO Fei.Pile-Side Excitation Integrity Testing for Existing Foundation Based on Wavelet Transform[J].Journal of Guilin University of Technology,2012,32(3):430-434. |
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| Authors: | ZHANG Jing-yi CHEN Long-zhu GAO Fei |
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| Affiliation: | 1. Institute of Engineering Safety and Disaster Prevention, School of Naval Architecture, Ocean and Civil Engi- neering, Shanghai Jiaotong University, Shanghai 200240, China; 2. Shanghai NDRI Engineering Testing Co. , Ltd. , Shanghai 200437, China; 3. The Ninth Design ＆ Research Institute of CSSC, Shanghai 200063, China) |
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| Abstract: | Three-dimensional （3-D） finite element model of pile-soil-pillar-beam system was used to simulate the testing, and wavelet transform was employed to deal with the simulated signal processing. The effects of the excitation-receiver configuration and the excitation mode, including transverse direction, longitudinal direction and oblique direction, were investigated. It is good to place the receiver in the side wall of the excitation face. Keeping the receiver close to excitation height and a certain distance from the superstructure can reduce the in- terferences of the superstucture. Compared to transverse direction exciation, longitudinal and oblique direction exciations are much better to identify the pile length. To strike in oblique direction is strongly recommended be- cause of much convenience in oractical oroeedure. |
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| Keywords: | Sonic Echo （SE） test wavelet transform pile testing 3D finite element |
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