| 应力波在平台-桩系统中传播的实验研究 |
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| 引用本文： | 柴华友,刘明贵,李祺,陈星烨.应力波在平台-桩系统中传播的实验研究[J].岩土力学,2002,23(4):459-464. |
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| 作者姓名： | 柴华友 刘明贵 李祺 陈星烨 |
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| 作者单位： | 1. 中国科学院武汉岩土力学研究所,湖北,武汉,430071
2. 长沙交通学院,湖南,长沙,410076 |
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| 摘 要： | 分析了应力波在平台－桩系统中的传播图案。对有限尺寸的平台来说，应力波在平台边界面上会发生反射，反射波不仅有同类波同时还有转换波，除此之外，平台表面的响应还受桩及桩土相互作用的影响。除非桩身反射波走时较长，可以避开平台上的各种干扰波，否则，由平台实测波形特征来分析平台下桩的完整性是很困难的。通过对平台上完整桩实测波形与异常桩波形进行比较，可以提高波形识别的准确度，此外，根据桩侧面测点及平台表面测点走时，相位、幅值间关系，将两者信号进行比较，可以从复杂的信号中辨别出桩身反射波信号。
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| 关 键 词： | 应力波 平台－桩系统 波阻抗 转换波 瑞利波 相位 |
| 文章编号： | 1000-7598-(2002)04-0459-06 |
| 修稿时间： | 2001年9月17日 |
Propagation of stress waves in a plate-pile system: experimental studies |
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| CHAI Hua-you ,LIU Ming -g ui ,LI Qi ,CHENG Xing -ye.Propagation of stress waves in a plate-pile system: experimental studies[J].Rock and Soil Mechanics,2002,23(4):459-464. |
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| Authors: | CHAI Hua-you LIU Ming -g ui LI Qi CHENG Xing -ye |
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| Institution: | CHAI Hua-you 1,LIU Ming -g ui 1,LI Qi 1,CHENG Xing -ye 2 |
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| Abstract: | Propagation patterns of stress wave in a plate-pile system were analyzed in this paper.For a plate of limited size,stress waves are reflected and transmitted from and across the boundaries,meanwhile,wave conversion occurs.Vibration of the plate surface is influenced not only by the waves reflected from its boundaries but also by the upward waves from the below piles,which are induced by the variation of impedance and the interaction between the pile and soil.When the reflections from the pile body take longer time than the reflections from the plate boundaries to its surface,the waves reflected from the pile body can be distinguished from the other.Otherwise,integrity of the pile beneath the plate is very difficult to analyze based on the waveform patterns measured on the plate surface.Accuracy of signal analysis can be increased by comparison of the waveforms measured on the plate surface with an intact pile below and the waveforms with an abnormal pile below.Also,comparing traveling time,phase and amplitude of waveforms from the pile shaft with these from the plate surface,the reflected wave from the pile body can effectively be distinguished from complex wave patterns. |
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| Keywords: | stress wave plate-pile system wave impedance conversion wave Rayleigh wave |
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