| 冲击回波法识别地铁盾构隧道注浆缺陷的有限元模拟研究 |
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| 引用本文： | 刘可,姚菲.冲击回波法识别地铁盾构隧道注浆缺陷的有限元模拟研究[J].江苏建筑,2013(6):32-35. |
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| 作者姓名： | 刘可 姚菲 |
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| 作者单位： | [1]江苏省建筑科学研究院有限公司 江苏省建筑工程质量检测中心有限公司,江苏南京210008 [2]河海大学土木与交通学院,江苏南京210098 |
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| 基金项目： | 江苏省“企业博士聚集计划”2011年度立项资助;江苏省科技计划项目“城市轨道交通和共同管廊建设关键测试技术研究”（JS2011JH24）;南京市建设系统科研项目计划“地铁隧道注浆质量冲击法检测技术研究”（201210） |
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| 摘 要： | 利用大型有限元软件MSC.MARC,对SGS（管片-注浆-土体）模型的冲击瞬态过程进行有限元模型瞬态响应模拟,分别得到了在注浆密实、注浆孔洞和注浆不密实三种工况下冲击响应的时程曲线.并通过FFT变换,分析不同注浆缺陷条件下的冲击响应的频谱特征.结果表明,该模型能够较为准确地模拟出机械波在SGS模型中的传播与反射,不同注浆条件表现出了不同的频谱特征,该结果表明采用冲击法识别盾构注浆缺陷的方法是可行的.
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| 关 键 词： | 有限元 SGS模型 缺陷模拟 频谱特征 |
Research on Identifying Defects in Metro Shield Tunnel Grouting by Impact Echo Method |
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| LIU Ke,YAO Fei.Research on Identifying Defects in Metro Shield Tunnel Grouting by Impact Echo Method[J].Jiangsu Construction,2013(6):32-35. |
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| Authors: | LIU Ke YAO Fei |
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| Affiliation: | 1.Jiangsu Institute of Building Science, Jiangsu Testing Center for Quality of Construction Engineering, Nanjing Jiangsu 210008 China; 2. College of Civil and Transportation Engineering, Hohai University, Nanjing Jiangsu 210098 China) |
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| Abstract: | Finite element software MSC.MARC is used to simulate the transient response of the SGS （Tube sheet - grouting - soil） model transient process of impact. Impulse response time history curves are obtained separately in grouting dense, grouting partial dense, and grouting with holes three kinds of conditions. By the FFT transformation, spectral characteristics of the impulse response in different grouting defects conditions are analyzed. The results show that propagation and reflection of the mechanical wave in SGS can be accurately simulated by the FEM model, and different grouting conditions show different spectral characteristics. The results show that it is feasible to identification grouting defects in shield method by using the impact echo method. |
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| Keywords: | FEM SGS model defect simulation spectral characteristic |
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